angela9brown and anyone else reading this, please see this guide to missing saves and other user files:
[CURRENT ISSUE] Sims 4 saves/user content disappearing (PC) | EA Forums - 11838402
It was written with Sims 4 in mind, but the OneDrive-related information is exactly the same. The only meaningful difference is what to search for: in the case of Sims 3, files like DeviceConfig and Version.txt as well as the Saves and Library folders.
If you need further help, please create a new thread in this forum. Since this thread is quite old, I'll lock it here.
