Sony users are reporting issue using 128GB SanDisk Extreme SD cards with a7 III
(Digital Photography Review)

According to multiple users on the Sony Alpha subreddit, Sony`s a7 III camera is having issues with a particular SanDisk SD card. Reddit user `shadyashell` originally made a post regarding an issue they were having with their Sony a7 III camera and SanDisk Extreme Pro 128GB SDXC UHS-I Card (Class 3) memory card. In the text of the post, they wrote: `Everytime I insert the card into slot 1 [I get] the error message `Unable to read memory card. Reinsert memory card. Slot 1` appears. I`ve reset the camera multiple times, formatted the card both on slot 2 and my laptop. Any advice on solving this issue?` Not long after posting, other Reddit users chimed in and echoed that they too had experienced an issue. Reddit user `iamtridluu3` said `I`m having the same issue. All six cards. Identical 128gb Extreme Pro. I could use it in slot 2 fine. Just slot 1 of both my a7 III and all six cards. Something is wrong with these cards.` Reddit user `dany74m` claims to have contacted Sony and been told that `[Sony] officially recognize[s] the problem` and `the camera or the card are not defective [it`s] just an incompatibility with the SD extreme V.30 128GB.` Reddit user `dany74m` added `[Sony] said they are aware and they are working to fix the issue with a firmware update in few weeks.` DPReview contacted Sony regarding the issue. A spokesperson for the company kept it short and vague, saying `our team is currently investigating the claims.` We will update this article if any new information becomes available.