Re: game save errors

@lile_1005  I'm not worried about Steam syncing so much as OneDrive, which can redirect your Documents folder and cause all sorts of issues.  One example is that OneDrive is full, it may prevent Sims 4 from writing to the Documents folder within OneDrive, thereby preventing saving.

A quick test is to create a new admin Windows account and play in that.  If you start with a local account, as in, you don't sign into Microsoft, OneDrive can't be involved by definition (since it needs a Microsoft account to link to), so you've taken that out of the picture.  Then if the game works, you know the issue is a setting in your main account.  If you get the same errors as before, the issue is more global.  Either way, you've narrowed it down significantly, and we can go from there.