How do I get sims 4 cc and mods to save to my new storage device?

Okay, so to make sure from what I've read, I need to make a backup, then cut the folder and go to the new storage and paste it there?

Then create an empty text file and copy this into it - MKLINK/J: (Or which ever letter your computer storage is) %UserProfile%/Documents/Electronic arts/The Sims 4" E:/ (Whichever the new storage letter is) The Sims 4" Is that right? Also to make an empty text file how exactly do I do that? 

Also when I'm done with that it says to press windows and type CMD and right click on command Prompt in the search results then Run Administrator then copy - MKLINK/J: (Or which ever letter your computer storage is) %UserProfile%/Documents/Electronic arts/The Sims 4" E:/ (Whichever the storage letter is) The Sims 4"  Highlight it in the text document and make sure to adjust the path of the folder to fit my needs. Then Right click on it and choose Copy, Activate the command Prompt Window then Right click the command prompt window and press enter. 

Then I should see "Connection created for %UserProfile%/Documents/Electronic arts/The Sims 4" <<===>> E://The Sims 4 and it should be linked.

Is that right, sorry I'm kind of dumb when it comes to this stuff but I really want to do this so I'll have more room.

@WolfGamer-Yumi  Yes, mostly.  Please keep in mind that if you place the Sims 4 folder within a folder on your external drive, that needs to be reflected in the file path.  As an example, if your external drive is D, and you create a folder called "Sims files" on D and put the Sims 4 user folder inside that, the command will be:

MKLINK /J “%UserProfile%\Documents\Electronic Arts\The Sims 4” “D:\Sims files\The Sims 4”

So you see above, the full file path is represented in the command.  But it's actually okay if you get  it wrong the first time: just delete the symlink and try again.  You can tell whether it worked by opening the symlink, i.e. the folder with the little arrow icon on it that you can see in the guide's screenshots.  If it points to the correct location, opening it will jump you to that location, and you'll see your Sims 4 files.

There are two reasons it's useful to create a folder on your external drive and put the Sims 4 folder inside it.  One is if the game itself is already on that drive: you can't have two folders with the same name in the same location, and you don't want the folders combined into one.  The other is if you ever need to start with a clean folder for testing or troubleshooting, you can simply drag the Sims 4 folder out of the folder it's in while leaving it on the external drive.

To create an empty text file, just search for Notepad and open it.

So the cmd keeps saying it's invalid, Going over it step by step I first went into my documents and then clicked into the electronic Arts folder. I cut the sims 4 folder and pasted it into my Maxone storage. Then I opened my Notepad and put this in-  MKLINK /E (Or my laptop storage letter) "%UserProfile%/Documents/Electronic Arts/The Sims 4" "D:/The Sims 4"

Then I pasted that into the cmd and pressed enter but it keeps saying it's invalid so I must have done something wrong.

@WolfGamer-Yumi  First of all, the command is MKLINK /J regardless of what letter your storage device uses.  Second, I hope the (or my laptop storage letter) part isn't in the command.  Please look at the examples in the guide and in my previous post for what the command should look like.

Oh, okay got it and no I didn't include the (or my laptop storage letter) part

_

Alright I think I got it, thank you so much for your help XD