@helka-exe Then the only explanation I can think of is that you somehow copied over the new Sims 4 folder, and it overwrote the old one. There's no way Sims 4 itself did this, and OneDrive shouldn't either unless the "old files" folder was in Documents or another folder that OneDrive syncs. Even a cleaner app would have simply removed one set of files, if it did anything at all, rather than replacing the old with the new.
I'm sorry, but I don't know what else to tell you. If the old saves are gone, and the drive that held them has been wiped, there's no way to get them back.
@puzzlezaddictI figured as much, thank you for the help anyway I have recreated some of the families since but just wanted to see if I could get my old gameplay back. Who knows what went wrong with it but it is clear that it's gone now. At least I know to be more careful with transferring files in the future🙂
