Problem with Coolpix P1000's card reading

Booted Cat

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I'm a Coolpix P1000 customer in China who has a problem with P1000's card reading and found difficulty getting this problem recognized by Nikon's Shanghai Service Center. I'm trying to elevate this problem to a higher authority at Nikon. If anyone can help, thank you in advance!

My problem concerns with P1000's difficulty recognizing two SanDisk Ultra 16GB UHS-I Class 10 48MB/s cards at the first time it is turned on every day. I have to turn it on several times to get it to recognize these cards.

Detailed problem history:
I had a P900 for 5 months this year (April to August). The P900 came with an SD card (see specs above) which I had used with the P900 during these 5 months successfully. Then, in this September, I sold my P900 and bought a P1000, which came with a new SD card (in the same specs). At first, I continued to use the 5-month-old card with the P1000. After only a couple of days, my P1000 started to fail to recognize this card at the first time it was turned on every day. I formatted this card with P1000 and the problem persisted. I then swapped in the brand new card that came with this P1000, and initially the new card worked fine. After about 10 days, P1000 started to show the same problem with the new card. I then realized that this is not a card-specific problem, but a problem with my P1000's card reading function. I sent my P1000 to Nikon's Shanghai Service Center, and they tested the P1000 with a new card and found no problem, and they decided that my P1000 had no problem. Actually, my P1000 (or all P1000s) might be problematic with any new card after 10 days of use or so.

I hope a higher authority from Nikon can pay attention to this problem and order the Shanghai Service Center to provide a new card reading component for my P1000. If the new component also produces the problem, it would mean that all P1000 card reading components have a design/manufacturing flaw that needs to be addressed. The above-mentioned 16GB 48MB/s card type is a very popular type of card (at least in China) - almost all camera stores will provide one such card as a gift that accompanies each camera they sell, so not supporting such a mainstream card could be a serious problem with P1000.

Regards,
Booted Cat
 
I doubt very much anyone from Nikon will be reading here.

It could even be your computer card reader corrupting your cards making it hard for the camera to read.

Make sure the cards you are using are genuine and not fakes ( sadly there are a lot around).

make sure your using cards with a high enough specification as well.

Take a video of what is happening or a photo of the lcd displaying the error message.

I’ve had a Nikon D3300 with this issue and discovered it was a disliking for Sandisk extreme with a gold label .

I switched over to Sandisk pro with black label and all was well again.
 
Last edited:
I'm having a card problem on a different scale. I bought a SanDisk V3 along with P1000 from a reputable sealer in the US. From time to time my machine will claim "card read error". I have to resit it. I suspect P1000 has a boot-up sequence timing problem, it reports the card status when the machine has not completely booted up. Well, just my quess based on my experiences dealing with electronics.
 
Last edited:
I doubt very much anyone from Nikon will be reading here.

It could even be your computer card reader corrupting your cards making it hard for the camera to read.
Not likely. Computers and card readers are usually more capable of reading cards than cameras. This related post regarding P1000's card reading is an example: https://www.dpreview.com/forums/post/61726772
Make sure the cards you are using are genuine and not fakes ( sadly there are a lot around).
They're likely to be genuine, as the two stores that give away these cards are tier-1 licensed sellers listed on Nikon China's official website, and this type of 16GB 48MB/s SanDisk Ultra card is widely used as gifts that accompany every new camera they sell primarily because they're cheap.
make sure your using cards with a high enough specification as well.
I suspect my problem is indeed caused by P1000's varying support for cards of different speed levels. A friend who has P1000 and a 128GB SanDisk Extreme Pro (95MB/s) has no problem so far. Nikon's Shanghai Service Center tested my P1000 with their own cards (new and old) without problems, probably because their card formats and speed levels are different than mine.
Take a video of what is happening or a photo of the lcd displaying the error message.
My P1000 is currently at Nikon Shanghai, therefore not available for video.
I’ve had a Nikon D3300 with this issue and discovered it was a disliking for Sandisk extreme with a gold label .

I switched over to Sandisk pro with black label and all was well again.
This is evidence that my problem might also be caused by P1000's disliking for certain card formats. A friend told me that new cameras like P1000 tend to support latest card formats best. My current cards are only SanDisk Ultras, not even Extremes. I will buy an Extreme Pro as a last resort.

Before that last resort, I will explore two options:

- Buy a new P1000 card-reading component at my own cost, if it's affordable.

- Let Nikon Shanghai send my P1000 and 16GB card to Nikon's Japan headquarters for checkup.
 
I'm having a card problem on a different scale. I bought a SanDisk V3 along with P1000 from a reputable sealer in the US. From time to time my machine will claim "card read error". I have to resit it. I suspect P1000 has a boot-up sequence timing problem, it reports the card status when the machine has not completely booted up. Well, just my quess based on my experiences dealing with electronics.
If by "V3" you are referring to "U3" then you're probably talking about SanDisk Extreme Pro (UHS-I V30 U3) cards which are at 95MB/s. This is the card recommended by notable camera review websites for use with P1000. If P1000 also fails this card, then the problem would be more severe than I thought.

Also, it looks like your problem is not "on a different scale" but exactly the same problem as mine. It looks more and more like the problem is a premature reading of the card during camera bootup as you said.
 
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I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.

.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
 
..I sent my P1000 to Nikon's Shanghai Service Center, and they tested the P1000 with a new card and found no problem, and they decided that my P1000 had no problem..
..Sorry to hear about the problem you're having..

..the memory card I use is the one below, and so far no problems..

cf69367f5bb64297a5b03306cf800c30.jpg

..because SanDisk is very popular, there are many "fakes" out there, so be careful when purchasing..

..below are some more informations..

c59021f8bc0d4a46b0dd3076385f7dd0.jpg.png

2b7833d603f643d8841e07704c5ab8b8.jpg.png

..while your P1000 is a Nikon Repairs, ask them to also check the cameras focusing accuracy, especially at the 3000mm focal point..

..Best wishes on your repair!

***********

..Cheers..
 
..I sent my P1000 to Nikon's Shanghai Service Center, and they tested the P1000 with a new card and found no problem, and they decided that my P1000 had no problem..
..Sorry to hear about the problem you're having..

..the memory card I use is the one below, and so far no problems..

cf69367f5bb64297a5b03306cf800c30.jpg

..because SanDisk is very popular, there are many "fakes" out there, so be careful when purchasing..
Will purchase at tmall.com which is supposed to be safer.
..below are some more informations..

c59021f8bc0d4a46b0dd3076385f7dd0.jpg.png

2b7833d603f643d8841e07704c5ab8b8.jpg.png

..while your P1000 is a Nikon Repairs, ask them to also check the cameras focusing accuracy, especially at the 3000mm focal point..
I actually asked that question too, and they confirmed that photo clarity is good.
..Best wishes on your repair!

***********

..Cheers..
 
..I sent my P1000 to Nikon's Shanghai Service Center, and they tested the P1000 with a new card and found no problem, and they decided that my P1000 had no problem..
..Sorry to hear about the problem you're having..

..the memory card I use is the one below, and so far no problems..

cf69367f5bb64297a5b03306cf800c30.jpg

..because SanDisk is very popular, there are many "fakes" out there, so be careful when purchasing..
Will purchase at tmall.com which is supposed to be safer.
..below are some more informations..

c59021f8bc0d4a46b0dd3076385f7dd0.jpg.png

2b7833d603f643d8841e07704c5ab8b8.jpg.png

..while your P1000 is a Nikon Repairs, ask them to also check the cameras focusing accuracy, especially at the 3000mm focal point..
I actually asked that question too, and they confirmed that photo clarity is good.
..Best wishes on your repair!

***********

..Cheers..
..Everything sounds good, and best wishes!

..Cheers..
 
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).

The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above.
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
 
Last edited:
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.

One of my clients has computer and her card reader has twice given me issues when trying to place my sd card back in camera. I now email files to her instead. So don’t rule out . Something as simple as an out of date driver can do all sorts of strange things.
 
Last edited:
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."

Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
One of my clients has computer and her card reader has twice given me issues when trying to place my sd card back in camera. I now email files to her instead. So don’t rule out . Something as simple as an out of date driver can do all sorts of strange things.
 
Last edited:
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."
also look at the fact that the P1000 uses a new processor and is able to use 4K so may well need a higher spec card to run more efficiently and reliably.
Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
you seem to be all over the shop. Your original post said they couldn’t find a problem.

Leading to you posting here to try get someone from Nikon headquarters make shanghai replace card reader in camera. Your now saying they can also recreate the issue themselves so why are here . It looks pretty obvious that Nikon need to repair your camera.
 
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."
also look at the fact that the P1000 uses a new processor and is able to use 4K so may well need a higher spec card to run more efficiently and reliably.
My research indeed found that P1000's card reading component supports UHS-I while P900 doesn't, meaning P1000 and P900 have different card reading components, which may have caused my problem.
Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
you seem to be all over the shop. Your original post said they couldn’t find a problem.
They couldn't find a problem with their own cards (at first they tried their own new cards, and subsequently they told me they also tried their old cards).

They indeed can reproduce the problem with my card (whether before or after reformatting it within my camera).
Leading to you posting here to try get someone from Nikon headquarters make shanghai replace card reader in camera. Your now saying they can also recreate the issue themselves so why are here . It looks pretty obvious that Nikon need to repair
Yes, they can reproduce the problem with my card but still insist it's not the camera's fault. I have contacted Nikon USA and Japan and am waiting for their replies. I will also propose to Nikon Shanghai that (1) I may buy a new card reading component at my own cost and (2) if they can send my camera and card to Nikon's Japan headquarters for further checkup.

Here I'm mainly sharing my problem, no longer hoping for a Nikon rep to show up now.
your camera.
 
Last edited:
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."
also look at the fact that the P1000 uses a new processor and is able to use 4K so may well need a higher spec card to run more efficiently and reliably.
My research indeed found that P1000's card reading component supports UHS-I while P900 doesn't, meaning P1000 and P900 have different card reading components, which may have caused my problem.
Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
you seem to be all over the shop. Your original post said they couldn’t find a problem.
They couldn't find a problem with their own cards (at first they tried their own new cards, and subsequently they told me they also tried their old cards).

They indeed can reproduce the problem with my card (whether before or after reformatting it within my camera).
Leading to you posting here to try get someone from Nikon headquarters make shanghai replace card reader in camera. Your now saying they can also recreate the issue themselves so why are here . It looks pretty obvious that Nikon need to repair
Yes, they can reproduce the problem with my card but still insist it's not the camera's fault. I have contacted Nikon USA and Japan and am waiting for their replies. I will also propose to Nikon Shanghai that (1) I may buy a new card reading component at my own cost and (2) if they can send my camera and card to Nikon's Japan headquarters for further checkup.

Here I'm mainly sharing my problem, no longer hoping for a Nikon rep to show up now.
your camera.
..Since when they tested with their memory card, and the camera worked fine..

..but when used your memory card, and found problems..

..this indicates the memory card you were using are defective..

..memory cards, just like any electronics, can go bad..

..one thing good about SanDisk, is they carry a Lifetime warranty on their memory cards..

..all you need to do, is to contact SanDisk, and they will arrange a replacement memory card for you..

..even with this said, recommend getting the memory card I had recommended..

..and also get an updated, maybe even better memory card reader to use..

..it's because memory card readers can go bad too..

***********

..Cheers..
 
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."
also look at the fact that the P1000 uses a new processor and is able to use 4K so may well need a higher spec card to run more efficiently and reliably.
My research indeed found that P1000's card reading component supports UHS-I while P900 doesn't, meaning P1000 and P900 have different card reading components, which may have caused my problem.
Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
you seem to be all over the shop. Your original post said they couldn’t find a problem.
They couldn't find a problem with their own cards (at first they tried their own new cards, and subsequently they told me they also tried their old cards).

They indeed can reproduce the problem with my card (whether before or after reformatting it within my camera).
Leading to you posting here to try get someone from Nikon headquarters make shanghai replace card reader in camera. Your now saying they can also recreate the issue themselves so why are here . It looks pretty obvious that Nikon need to repair
Yes, they can reproduce the problem with my card but still insist it's not the camera's fault. I have contacted Nikon USA and Japan and am waiting for their replies. I will also propose to Nikon Shanghai that (1) I may buy a new card reading component at my own cost and (2) if they can send my camera and card to Nikon's Japan headquarters for further checkup.

Here I'm mainly sharing my problem, no longer hoping for a Nikon rep to show up now.
your camera.
..Since when they tested with their memory card, and the camera worked fine..

..but when used your memory card, and found problems..

..this indicates the memory card you were using are defective..
Remember in my original post I mentioned 2 SanDisk Ultra 16GB cards, one 5 months old and one only 1 month old. Both are provided by Nikon China's tier-1 licensed stores (and they're from two stores independently, not from one single store). Both can produce the problem after some use. So it's more likely that P1000 doesn't support SanDisk Ultras very well, than that both these Ultra cards are physically damaged.
..memory cards, just like any electronics, can go bad..

..one thing good about SanDisk, is they carry a Lifetime warranty on their memory cards..

..all you need to do, is to contact SanDisk, and they will arrange a replacement memory card for you..

..even with this said, recommend getting the memory card I had recommended..

..and also get an updated, maybe even better memory card reader to use..

..it's because memory card readers can go bad too..

***********

..Cheers..
 
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."
also look at the fact that the P1000 uses a new processor and is able to use 4K so may well need a higher spec card to run more efficiently and reliably.
My research indeed found that P1000's card reading component supports UHS-I while P900 doesn't, meaning P1000 and P900 have different card reading components, which may have caused my problem.
Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
you seem to be all over the shop. Your original post said they couldn’t find a problem.
They couldn't find a problem with their own cards (at first they tried their own new cards, and subsequently they told me they also tried their old cards).

They indeed can reproduce the problem with my card (whether before or after reformatting it within my camera).
Leading to you posting here to try get someone from Nikon headquarters make shanghai replace card reader in camera. Your now saying they can also recreate the issue themselves so why are here . It looks pretty obvious that Nikon need to repair
Yes, they can reproduce the problem with my card but still insist it's not the camera's fault. I have contacted Nikon USA and Japan and am waiting for their replies. I will also propose to Nikon Shanghai that (1) I may buy a new card reading component at my own cost and (2) if they can send my camera and card to Nikon's Japan headquarters for further checkup.

Here I'm mainly sharing my problem, no longer hoping for a Nikon rep to show up now.
your camera.
..Since when they tested with their memory card, and the camera worked fine..

..but when used your memory card, and found problems..

..this indicates the memory card you were using are defective..
Remember in my original post I mentioned 2 SanDisk Ultra 16GB cards, one 5 months old and one only 1 month old. Both are provided by Nikon China's tier-1 licensed stores (and they're from two stores independently, not from one single store). Both can produce the problem after some use. So it's more likely that P1000 doesn't support SanDisk Ultras very well, than that both these Ultra cards are physically damaged.
..memory cards, just like any electronics, can go bad..

..one thing good about SanDisk, is they carry a Lifetime warranty on their memory cards..

..all you need to do, is to contact SanDisk, and they will arrange a replacement memory card for you..

..even with this said, recommend getting the memory card I had recommended..

..and also get an updated, maybe even better memory card reader to use..

..it's because memory card readers can go bad too..

***********

..Cheers..
..Ohh, I see.. thanks for mentioning again..

..then maybe/probably there is something "not compatible" with those "Ultra" memory cards with the P1000..

..it is best then to use the "known" memory cards that will work well with the P1000 camera..

..and I'm still recommending.. :-)

790f1a93deb64c2db2264c34411469c5.jpg

***********

..Cheers..
 
I'm using a SanDisk Extreme Pro 64Gb that came free with the camera.

Also tried a 32Gb PNY Micro SD with adapter.

Not had any problems.
According to my experience, brand new cards don't have this issue - you have to use them for some time.

My typical usage pattern is:

Step 1: After each shooting activity, put the SD card into my desktop computer (Dell XPS 8900) and copy the whole DCIM folder to the computer.

Step 2: On the computer, select, preserve and share online the good ones among the photos in the DCIM folder just copied to the computer.

Step 3: Safely remove the SD card from the computer and put it back in the camera and delete all photos on it using the camera's Delete All command (my desktop computer's built-in card reader can't delete photos on the SD card because it always thinks the SD card is write-protected, which is a defect of the card reader; I actually requested a replacement card reader early this year when my XPS 8900 was still in warranty, but the second card reader exhibited the same defect after a while of use, implying all XPS 8900 card readers have this problem).

Step 4: Charge the camera if it's a long shooting activity.

I never reformat the SD card within the camera unless something abnormal happens (such as the very first time my P1000 failed to recognize the card). Reformatting doesn't help the problem (both I and Nikon Shanghai have confirmed this).
.

Might be worth cleaning the contacts in the camera with an ear cleaner and some alcohol?
Looks like it could be your card reader introducing an issue as I first suggested and you replied with “Not likely. Computers and card readers are usually more capable of reading cards than cameras”

and yet here you stating an issue with your card reader.
You missed a line I had just added:

"The same SD card worked so perfectly with P900 during 5 months. The usage pattern had been exactly the same as above."
also look at the fact that the P1000 uses a new processor and is able to use 4K so may well need a higher spec card to run more efficiently and reliably.
My research indeed found that P1000's card reading component supports UHS-I while P900 doesn't, meaning P1000 and P900 have different card reading components, which may have caused my problem.
Also, consider the fact that my computer's card reader always *reads* the card but never *writes* to it because it always thinks the card is write-protected. This generally rules out the possibility that the card reader introduces something wrong to the card.

Also, consider the fact that Nikon Shanghai reformatted my SD card within my P1000 and tried to turn on the camera again the following day and still found the problem. This generally rules out the possibility that my computer introduced some change in the card's filesystem structure or so that caused the problem.

:-)
you seem to be all over the shop. Your original post said they couldn’t find a problem.
They couldn't find a problem with their own cards (at first they tried their own new cards, and subsequently they told me they also tried their old cards).

They indeed can reproduce the problem with my card (whether before or after reformatting it within my camera).
Leading to you posting here to try get someone from Nikon headquarters make shanghai replace card reader in camera. Your now saying they can also recreate the issue themselves so why are here . It looks pretty obvious that Nikon need to repair
Yes, they can reproduce the problem with my card but still insist it's not the camera's fault. I have contacted Nikon USA and Japan and am waiting for their replies. I will also propose to Nikon Shanghai that (1) I may buy a new card reading component at my own cost and (2) if they can send my camera and card to Nikon's Japan headquarters for further checkup.

Here I'm mainly sharing my problem, no longer hoping for a Nikon rep to show up now.
your camera.
..Since when they tested with their memory card, and the camera worked fine..

..but when used your memory card, and found problems..

..this indicates the memory card you were using are defective..
Remember in my original post I mentioned 2 SanDisk Ultra 16GB cards, one 5 months old and one only 1 month old. Both are provided by Nikon China's tier-1 licensed stores (and they're from two stores independently, not from one single store). Both can produce the problem after some use. So it's more likely that P1000 doesn't support SanDisk Ultras very well, than that both these Ultra cards are physically damaged.
..memory cards, just like any electronics, can go bad..

..one thing good about SanDisk, is they carry a Lifetime warranty on their memory cards..

..all you need to do, is to contact SanDisk, and they will arrange a replacement memory card for you..

..even with this said, recommend getting the memory card I had recommended..

..and also get an updated, maybe even better memory card reader to use..

..it's because memory card readers can go bad too..

***********

..Cheers..
..Ohh, I see.. thanks for mentioning again..

..then maybe/probably there is something "not compatible" with those "Ultra" memory cards with the P1000..

..it is best then to use the "known" memory cards that will work well with the P1000 camera..

..and I'm still recommending.. :-)
Yes, I will definitely consider it, although alandalsong seems to have reported the same problem with such an Extreme Pro card: https://www.dpreview.com/forums/post/61791888
790f1a93deb64c2db2264c34411469c5.jpg

***********

..Cheers..
 
..Right.. again, thanks for mentioning..

..however, I have been using the memory card that's posted without any noted problems at all..

..for me, I always buy my memory cards from Best Buy, which is a source that I trust to buy authentic products.. just like previous I purchased my Beats headphones from Best Buy also, since there are so many "fakes" out there..

..Cheers..
 

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