I bought a "Maxtor 3000LE 5400 RPM 120 GB USB 2.0 Hard Drive" from amazon.com about 3 months ago, too. I needed it to store a lot of video data that wouldn't fit on my internal 30GB drive, and it works great. It requires a wall outlet, so I'm not sure if it's what your laptop-using friend is after. But, if he
does plan on purchasing it, tell him that I'd appreciate it if he would use the following link:
Maxtor 120 GB USB Hard Drive.