2019 iMac won’t read a 64 gb SD card. Any ideas.

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LDBOK Senior Member • Posts: 1,270
2019 iMac won’t read a 64 gb SD card. Any ideas.

I have always used 32gb cards before, but recently got a 64. I formatted the card in the camera and shot about 400 images on it. The first time Lightroom said there were no images on the card. I canceled and reinserted the card and the iMac wouldn’t recognize it at all. I moved the images to another card using the camera, reformatted the card and took a few test shots. That time Lightroom said it could not open the previews for the images but the image files were showing as on the card. Any ideas what is going on. I used an external card reader and it read the card with no problem. The internal still reads 32gb just fine.

Any help greatly appreciated,

Larry

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