Buy.com has the Seagate FreeAgent Go 640GB USB 2.0 Portable Hard Drive in Tuxedo Black, model no. ST906403FAA2E1-RK for $99.99 (159.99 – 60 instant savings) with Free Shipping for a limited time. The Seagate FreeAgent Go 640GB USB Portable Hard Drive comfortably store all your files. It includes easy-to-use software that lets you automatically back up your data, synchronize files, and encrypt important files and folders. It features 480 Mb/s and 5400 RPM.