This Hard Drive

Buy.com has the Toshiba 320GB USB 2.0 Portable External Hard Drive With 8MB Buffer Cache - Grey $145.35 Shipped after $5 off $100 new customer coupon.

Product description from Buy.com:

Hassle-free, simple and easy, Toshiba’s external hard drives are the solution to your backup needs. The included NTI Shadow backup!
software eliminates the need to push a button or click an icon to activate a backup. Plug in the drive, load the software and you’ll have peace of mind in knowing that all of your important digital photos, music, movies and documents are backed up, protected and portable. The software runs in the background capturing updates to files and automatically saving them to the external drive.

Compatible with both Macs and PCs, it’s USB powered and ready to go wherever you need your data.

FeaturesUSB powered for portabilitySmall size saves desktop spacePlug and play, ready to go out of the boxEasy to use Windows and Mac softwareInternal shock sensor and ramp loading technology to help protect your driveSimple solution for backup or increasing computer storage3 Year Limited Warranty

Product link.