Re: I did everything and still can't bring my CC back into the Sims 4
@DWZ3 The localthumbcache.package file should never be in your Mods folder, it's always located in your Sims 4 folder. It's a cache file where the game will store certain data for fast retrieval whenever it needs it while you are playing. If you have any outdated mods or CC that is causing problems in your game, some of the bad data from those files might be stored in the localthumbcache.package and continue to cause problems in your game even after you remove the mods or CC. This is why it's a good idea to delete the localthumbcache.package file any time you make changes to the contents of your Mods folder. The game will auto-generate a new one the next time you launch it. There should have been one in your Sims 4 folder from when you re-launched your game after moving your old Mods folder to your Desktop. That we are not seeing one, along with a new Mods folder, after you re-launched your game has me concerned we are still not looking in the correct User file. That's why I was asking about OneDrive.
If you haven't already re-launched the game since you moved your old Mods folder to your Desktop, then try that now. If all works the way it should then you will have a new Mods folder (empty except for the Resource.cfg file) and a new localthumbcache.package file in your Sims 4 folder. After you have tried the re-launch, it would still be a good idea if you could attach another screenshot of your Sims 4 folder including the address bar so we can be certain we are looking in the correct folder before we try the next step.