Re: Custom Content will not show up with Sims4 on external drive
@Majale2006 That error means exactly what it says: that wherever you're trying to create the symlink itself (the link, not the destination), there's already a file or folder with the same name. It'll be easier to help you if you simply post the command you used.
Please also list the default location of Documents on your computer. Write "command" in the Windows search field, open Command Prompt, and enter this command:
reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" /v "Personal"
Then post the result.