Junction file error for hard drive

@bbjerka  The second screenshot you posted is, again, the folder that contains game's program files, which is not where you want your user folder.  It sounds like you haven't created a separate folder on your external drive for the user folder, so do that now.  Open the external, right-click the empty space, select New > Folder, and name the folder Sims 4 Data (exactly like that, no extra characters).

Next, go into Documents > Electronic Arts, right-click the Sims 4 folder, and select Cut.  Open the Sims 4 Data folder you created on the external and select Paste, so that the "The Sims 4" folder that was previously in Documents > Electronic Arts is now in "Sims 4 Data."

Finally, open Command Prompt and enter this command:

MKLINK /J “C:\Users\mmaka\Documents\Electronic Arts\The Sims 4” “D:\Sims 4 Data\The Sims 4”

Please just copy and paste the command; don't try to write it out, which is a significant reason these commands don't always work for other people.  Additionally, once you move the Sims 4 folder, do NOT launch the game until after you've created the symbolic link.

If the command doesn't work, please post a screenshot of the Command Prompt window so I can take a look.