I have a pile of small USB-powered hard drives that I use to back up various devices. All of them are inexpensive, have somewhat limited storage, and are encased in plastic. The latter feature always makes me apprehensive about traveling with the drives, as they just don't seem to be sturdy enough for a lot of handling. The Iomega eGo Helium Portable Hard Drive ($149.99 for 1 TB, $99.99 for 500 GB) is built to take on a lot of abuse and
