Hi boringame. 4 months ago I added an 80 Gig [bold]WD Dual-option External USB Hard Drive[/bold] made by Western Digital. The price on this was a little under $100. I run XP on a Sony VAIO desktop which has a modest 60 Gig internal hard drive. It's so far been a nice addition as I use it mostly for my music lib and also to store video files. (I especially like the short features starring Jenna Haze, Samantha Sterlyng, Katie Morgan, or Aurora Snow. Well, I guess thats another topic entirely.) ;> It also came with some nifty software for backing-up your files. This is the first external drive that I have bought so I'm not exactly an expert. Good Luck!