> The issue is that the only 'format' option for the SD card, also seems to wipe the internal memory.
You have mixed up 1,2,3 settings with M1, M2, M3.
The latter ones are stored on the card. Of cource they are lost.
... ... ...
As are the CAMSET settings backup files.
I think the OP knows very well what files he wants to keep. And the answer is that, if you have thousands of images on your card, no there is no quick delete-all function that does not remove the other stuff: the video folders, the M1-3, the CAMSET files.
He has discovered how to delete multiple pics at once (without selecting each one), doing it by date. I'm a hoarder: I keep old stuff on the card until it fills up, the year ends, I go on a trip, etc. I do much the same, but I do it by folder rather than by date. Thanks for the hint as I might have more than one folder per date. If I need space because I've forgotten to housekeep, I delete oldest folders.
What else might be possible. Well, I have an idea, and it is going to get shouted down, and indeed, I take no responsibility if it does lead to data loss...
Put your card in a card reader and use your computer to delete folders. Hugely quicker than the camera interface.
Then: put your card back in the camera and tell it to
repair the image database.
I have not done this. It is very possibly hugely unwise. Please ignore the whole idea!
I
have added and removed individual images followed by a database repair. Now I come to think of it, I once deleted all the raw files, leaving the jpegs, and repaired the database
Don't ask why: this reason, that reason, or none.
Any reasonably Linux-fluent person could do that removal of all the raws with just a single command: it doesn't get much quicker.
I get occasionally attacks of techiness
and just try things. I cry if it leads to bad things. Don't listen to old weirdo nerds on the internet, lol.
On the camera,
format means format and
everything is lost. That's the only way to delete all the images in one go.