Scores are disappearing from computer
I've had 3 projects completely wipe themselves from my computer- they weren't saved to a different location or in my recycle bin, and I've been working on them for months with no issue until now. What is really strange to me is that I save two copies of my score everytime I'm done writing for the day- one as "piece_title_." and one as "piece_title_backup." and both are disappearing. On top of that, my autosave is full of just "my first piece" scores, it took me quite some time to find one of the piece's autosaves and I don't think the other piece even has an autosave (which it DEFINITELY should have, it was a four movement score that I had been working on for quite some time.)
For more information, one of the pieces disappeared right after I saved it (twice) and closed musescore, and the other two pieces disappeared sometime in the last week, as I haven't worked on them in a couple days. They were by far my largest file sizes, if that's at all relevant?
What's causing this?