I think that the OP has some data on the drive that they wish to recover. Partoitioning or formatting will destroy this data. It is a last resort, only to make the drive usable, writing off the data that's on it.
If the drive is coming up in the bottom part of the screen (under Disk 0...Disk 1...) then you want to right-click in on (or near) the word disk. You should get a menu that says:
Change Drive Letter and Paths
Eject
Properties
Help
If this comes up, and Change Drive Letter and Paths comes up dark (not greyed out) then left click on this option and pick a drive letter that is not already in use on your system.
If the menu comes up, but you can't change drive letter, click "properties" and tell us what info you get.