Usually when a one of my cards gets corrupt, it’s one file that is corrupt and can’t be read, probably from a brownout/ power outage while writing. I have pulled these cards and been able to recover nearly all the historical data using a computer in the past. AFAICT, for some reason, when a single file is corrupt, and the wyze camera goes to overwrite that file, it instead stops recording to the sd card and shows the size of that corrupt file in the sd card size spot until the card is reformatted. ie, the size of the file that was corrupt in your case was 46MB.