If your OneDrive is full, or your "The Sims 4" folder is larger than the storage you have, you can choose to stop automatically syncing Documents overall, or the Sims 4 folder, or some subfolder, for example the Mods folder. (Please see the next section below.) You can still manually...
Once your packs are loading properly, you can restore your saves, Tray files, mods and custom content, and screenshots (if you want to keep them) from the Sims 4 user folder you renamed before uninstalling the game. Move these files to the corresponding new folders within Documents ...