Received my Sony A7III about 3 weeks ago. I only use SanDisk ExtremePro SD cards with great success and had both a 128GB and 64GB R95/W90MBs UHS-I V30 card, that are about 6 months old, that I put into the Sony. Both cards worked just great; I write raw, and the small amount of video I do, to the 128GB card in slot 1 and Ex. Fine Jpegs to the 64 GB card in slot 2. Wanted a backup 128GB UHS-I card so I ordered the same model as the one I have and it came last week. I put it into the Slot 1 and immediately got a black screen saying “Unable to read memory card. Reinsert memory card. Slot 1.” You cannot format the card or operate the camera when this message is visible. So I removed the card and the camera was back to normal. Put the card into slot 2 and I did not get the screen and was able to format the card and take photos with it in slot 2. But as soon as I put it in slot 1, I got the same error message and the camera stopped working. I assumed the card was bad, so I returned it.
Received the replacement 128GB card on Friday and when put in slot 1 of the A7III it showed the same message as before. Just like with the new 1st card when I put the card in slot 2 of the A7III, I was able to format it and take photos, however when I put the card back into slot 1, the same error message appeared. So I tried the replacement card in the UHS-II slots of my Panasonic G9 And Nikon D500, where I used the original 128GB UHS-I card with no issue, and the new replacement card worked just fine in both, I was able to format, take photos and transfer no problem. Now that I knew the replacement 128GB card was working OK, I again put it in the A7III slot 1 and got the same error message. Put it into slot 2 and was able to format, take photos and transfer again with no problem. The replacement card refused to work in slot 1, just as the 1st new one did. However my original 6 month old 128GB card works just fine in slot 1. I tried 3 other 64GB SanDisk ExtremePro UHS-I cards in slot 1 with no issues, my issue is limited to 2 of the 3 128GB cards I tried.
It appears I either I have a bad slot 1 in my A7III or maybe there is a problem with slot 1 reading 128GB UHS-I cards? Anyone else have this issue? Thought I would try here before contacting Sony about sending the A7III in to them.
EDIT* Talked with Sony camera support. They are aware of compatibility issues specifically with SanDisk 128GB cards with the Sony A7III in slot 1 and are working on a solution. They suggested I: 1) use Sony 128GB cards that have no issues, 2) use the 128GB SanDisk card in slot 2, 3) Contact SanDisk to ask for a replacement.
Received the replacement 128GB card on Friday and when put in slot 1 of the A7III it showed the same message as before. Just like with the new 1st card when I put the card in slot 2 of the A7III, I was able to format it and take photos, however when I put the card back into slot 1, the same error message appeared. So I tried the replacement card in the UHS-II slots of my Panasonic G9 And Nikon D500, where I used the original 128GB UHS-I card with no issue, and the new replacement card worked just fine in both, I was able to format, take photos and transfer no problem. Now that I knew the replacement 128GB card was working OK, I again put it in the A7III slot 1 and got the same error message. Put it into slot 2 and was able to format, take photos and transfer again with no problem. The replacement card refused to work in slot 1, just as the 1st new one did. However my original 6 month old 128GB card works just fine in slot 1. I tried 3 other 64GB SanDisk ExtremePro UHS-I cards in slot 1 with no issues, my issue is limited to 2 of the 3 128GB cards I tried.
It appears I either I have a bad slot 1 in my A7III or maybe there is a problem with slot 1 reading 128GB UHS-I cards? Anyone else have this issue? Thought I would try here before contacting Sony about sending the A7III in to them.
EDIT* Talked with Sony camera support. They are aware of compatibility issues specifically with SanDisk 128GB cards with the Sony A7III in slot 1 and are working on a solution. They suggested I: 1) use Sony 128GB cards that have no issues, 2) use the 128GB SanDisk card in slot 2, 3) Contact SanDisk to ask for a replacement.
Apple
iPhone 6s back camera 4.15mm f/2.2
4mm
f/2.2
1/15s
ISO 200
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