Today only, September 21, 2011, Woot is offering the Clickfree C2N 640GB Automatic Portable Network Backup Drive with Cradle for $79.99. Shippig adds $5.

The Clickfree 640GB C2N Portable USB 2.0 Network Backup Drive is a complete multi-computer Home Backup solution that works with your home router. It helps customers to backup all of their computers automatically without connecting to each computer. The C2N can backup both Windows and Mac computers at the same time. It features 256-bit hardware encryption, password protection, multiple machine backup via your home or office network, and more.