Re: How do I move Sims 4 progress from my Mac to my Windows 10?
@frankiesdoll You saw this error with the entire Mods folder removed? It's possible that you opened the OneDrive version of Documents rather than the one stored on your computer. To make sure, open a File Explorer window, click This PC in the left panel, double-click your C drive, then open Users > your username > Documents etc.
If that doesn't help, move the entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, again going through the This PC path.