I have the same issue, converting from an S8+ with a 128 GB Sandisk Ultra card. I have also tried to backup my data with a computer, but it won't do a clean backup. It starts to copy the files, then it all frees, and it won't respond. I have to unplug the SD-card reader and reinsert it again. I've tried to use a recovery software, and this also stops in the middle of the process of checking the SD-card. I can see all my files but can't get a copy of them out of the card. Please help!
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