When I uninstalled and reinstalled the game/origin, I didn't keep my existing Sims 4 folder/saves in Documents/Electronic Arts. I moved it to an completely other hard drive for safe keeping. And I did start a new game but the saving option still wasn't working.
Also I don't have OneDrive on my computer.
@BlueRoseEnigma Please try playing in a new admin user account on your laptop, just as a test. Let me know whether you can save your progress.
If you can't, please run a dxdiag and attach it to a post.
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
