My bad it doesn't have to be external. It's just kinda doper in my opinion to throw all your files on a hard drive and kind of store it in the back of your closet for safe keeping.

However I have two internal hard drives now. Fuck how I hope the old one's not fried, I need my old shit, and having 750 GB worth of memory would be cool. Of course it would require me to update my RAM sometime soon if I want to count on the ability to use all of the memory without slowing my computer down a lot. :|

Nice Hard Drive - Over $100.00
Any windows OS - Over $100.00