Yes. It won't be as simple as finding the drive in "My Computer" and right-clicking it to select "Format..." though. You'll have to use the "Disk Management" utility but don't worry, it's not difficult. If you're using Win10, just right-click the "start" flag, then pick "Disk Management" from the list. I'm not 100% certain of what you'll see, but in the bottom half of the window, it should list all "attached" drives. This EHD should show up but will likely have a bunch of "unknown" things listed (format, partition types, etc). Just select the "Unknown" partition on this drive (right-hand, lower half) and delete it, erase it, or whatever option it gives you. When that's done, you will be able to create a "Primary" partition and choose "NTFS" as the filesystem.