sixtiesbaby62 The underlying cause here could be low storage on your computer, so please make sure you have enough space on your C drive. I don't know how large your Sims 4 user folder is, but the computer needs 20-25 GB free with the folder stored locally, or OneDrive may try again to push it to the cloud. And game updates can temporarily take a lot of extra space, which may explain why this keeps happening.
Can you see the Sims 4 user folder in Documents > Electronic Arts? If so, right-click it and select "Always keep on this device."
If you can't see the folder on your computer, please see the "Restoring missing saves" section of the first post of this thread:
[CURRENT ISSUE] Sims 4 saves/user content disappearing (PC) | EA Forums - 11838402
In general, I'd suggest not allowing OneDrive to touch your Sims 4 files at all. But if you'd prefer to keep using it, that guide has a couple suggestions for how to prevent it from causing problems.
