I have my 1TB SATA II hard drive partitioned as New Volume (C:) and Data File (E:). I have these partitions backed up to my WD My Book 2 TB external drive. My problem is that I did not know enough to assign the external drive a drive letter when I started backing up. Now when I go to My Computer all I can get is the two backed up files and can’t use the external HDD for anything else. How can I assign a File Drive letter to my external drive? Every thing is also cloned to another WD My Book with the same situation so I can afford to lose this data on the drive in question if necessary, but had rather not.