This is 4X the storage, for $5 less than what Seagate sells their single Terabyte (1 TB) size.
Seagate FreeAgent GoFlex Desk 2 TB External Hard Drive
$165.99 $94.99 (43% off)
USB 3.0 or FireWire
From the Manufacturer:
The GoFlex Desk external drive delivers high-capacity storage, backup and encryption for all your files with its plug-and-play USB 2.0 connectivity. You now have versatile connection options to suit your needs. Simply pair the drive with a USB 3.0 or FireWire 800/USB 2.0 GoFlex Desk desktop adapter and instantly increase your performance by up to 10x.