@imzadi35 I wrote this guide for Sims 4, but the concepts are the same for Sims 3:
https://answers.ea.com/t5/PC/CURRENT-ISSUE-Sims-4-saves-user-content-disappearing-PC/m-p/12475370
Choose whichever category suits you and follow the instructions. If you get stuck on a particular step, let me know what you're trying to do and how it's not working.
I personally don't have OneDrive linked at all, but it IS possible to use it selectively while preventing it from syncing your data automatically.
Thank you so much for helping me 🙂 I will check this out.
