Moving Mods from Drive C to D

You have to have adim control to move your documents folder to a different drive. Mine is set in the D drive. A shortcut is just a short cut, it does not contain the actual files.
To do this, right click on your actual documents folder, then go to location, and change the location there. ex. mine is D :\Documents
Or, you can just move your Sims 4 folder containing your mods to the D drive. you don't have to move your entire Documents folder, unless that is what you want to do.