moving the game to a external hd

communiscats​  Okay, here's the command you want to use:

MKLINK /J "%UserProfile%\Documents\Electronic Arts\The Sims 4" "E:\The Sims 4"

Make sure to first remove the Sims 4 folder that's currently in Documents > Electronic Arts, that you created when you opened the game after moving your old Sims 4 folder.  You can delete the new folder if there's nothing inside it you want to keep, but if you're not sure, just move it elsewhere for now.

If the above command doesn't work, use the precise location in the command:

MKLINK /J "C:\Users\dhiul\Documents\Electronic Arts\The Sims 4" "E:\The Sims 4"

This assumes that the Sims 4 folder on your external drive has your saves and other data inside it.  If it doesn't, just move that data to this Sims 4 folder after you create the symlink.