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I ran some checks and found no more issues. I did the "if the file is missing/incorrect" option. It seems like it was just 2 sessions from that day acting up. 1 tag session entry gave me 2 missing file errors and the other entry session gave me 1 corrupt file error. Maybe it was my anti-virus acting up and doing scans over the files I was just viewing. Those were just normal jpgs and png images, nothing really out of the ordinary.
I'll probably be more cautious and do backups just in case. I already have a NAS but never used it and don't know how I should set it up with hydrus but I'll probably make a new thread here(or somewhere more active) to discuss storage backups and safety. Thanks again.