I may have added a few unassociated details. I wanted an SSD as my operating system drive. I cloned everything from my 2 TB internal drive, which I had pretty much set up like I wanted. I wanted to move the data files to the 2 TB drive that I had left over. Somewhere along the way, I made the D folder and then, in an altogether different problem, I could not get 4 partitions off the 2TB drive. That was a whole nother problem. I had to end up Nuking that drive to get it back to a single partition. (which it is now). I still have the D folder showing up on the explorer, right in front of the "Desktop", "Downloads", "Music", "Pictures", and "Videos". I call it a folder, because it says " Folders (6)" just before the list of the above items. Just below that is the bar showing the "Windows C": drive, and now, the "Data Drive D" that I just installed, and the "DVD RW Drive E"
I hope that I have not further complicated the situation. Right now, all I really need to do is get rid of the "D" folder.