LoneFox113 Did you get rid of OneDrive, or at least tell it to stop syncing your data? If so, that explains what happened—OneDrive moved your files off of your computer to cloud storage. You should still be able to see the files on onedrive.com, either in My Files or the Recycle Bin.
It sounds like you preserved everything important though, so you could also just start the game to create new versions of the missing files, then restore what you saved.
However, if you did something else and your data disappeared, it would be best to address that before trying to play again. In this case, please let me know exactly what you did, or tried to do, so we can figure out how to prevent this from happening again.