Hello swood...
I'm just pulling this from my mind since I'm on the go and decided to check in on the Forum. This is what I have in mind: your external hard drive should appear in the "My Computer" or "Computer" window (whichever Windows OS you may be running).
Right-clicking on that hard drive, you should be able to format it from there, and be able to select what type of format that you want (NTFS, FAT32). At least I think that's how you can do it. Hope it works. Good luck!