@sdetweil
You are more than likely correct the sd card has started to fail.
That is why I went to the M.2 ssd’s they do not seem to fail as often as USB drives did for me. and I have gave up on sd cards on anything that I do not HAVE to use them in… I suppose if I would fork out the money for the better ones maybe they would last longer… Sorry to Hijack your post. @arh