Random files from my game folder are gone for no reason

I moved one of my games from my old computer to my new one, but just after I did, I noticed that the editor version of my other game was suddenly Unknown! I put it back to its original version and went to boot it, but almost all the files were gone! I still have a backup of the game, but it's old and has nothing of what I added new! I had changed so many things and it's gone! Can someone please help me! My version is 2020.3.3f1 and I also have 2020.3.23f1 but I don't use it. This is where it said unknown: Editor:

Edit: it's already too late