So I had an issue with this external HDD a few days ago. It simply was not showing up and I still have no idea how it fixed. That thread is here:
External HDD not Initializing, Not in , Need Recovery! - Solved - Windows 10 Forums

Now the same drive is doing something a little different.
Click image for larger version. 

Name:	image.png 
Views:	1 
Size:	139.8 KB 
ID:	134022
I'd backed up a large portion of my files and when I went to back up the rest I started getting this error.

Unlike before the HDD is showing up. I'm guessing it has something to do with my partitions.
When I bring up partition wizard I don't see the HDD there:
Click image for larger version. 

Name:	image.png 
Views:	1 
Size:	154.5 KB 
ID:	134016
Unless I'm missing something....which I very likely am.

Here what my Disk Management looks like
Click image for larger version. 

Name:	image.png 
Views:	1 
Size:	293.7 KB 
ID:	134021

ALL HELP IS GREATLY APPRECIATED, and thanks!