I hope someone here will have a good idea for a solution.
But I’m afraid I can only give the advice to give the SD card back to the reseller where you bought it or to replace it there.
I do have the same problem with a 32GB SD card. It also works in about half the cases and the rest of the cases the FP2 claims after a reboot that it’s corrupt. I’ve also formatted it several times, tried it in various FP2 devices and with different operating systems. So it seems to be a problem with the SD card…
When searching for a compatible SD card you might have a look here:
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