First off, I've done this before so I know it is possible. The problem is I just can't recall HOW I did it before.
Basically, I reinstalled Windows 10. Before doing so, it was working well and it was configured just how I liked it. All of my document folders (pictures, music, videos, and downloads) were all redirected to my network drive, which was assigned to drive letter 'F'. It wasn't always assigned to drive letter 'F', though.
At square one drive letter's E, F, G, and H are all reserved for USB drives. This is default when installing Windows 10 on this machine. Before I found a way to change the drive letter of these so I could use the drive letters I wanted (E and F, since they are the ones I'm used to using for my other hard drives). Now I can't think of how I did it.
So the question is, how can I change the drive letters of the unconnected devices which have reserved drive letters that I want?