"Seagate Manager also let us create a password-protected folder that safeguards files with 256-bit AES encryption. Lastly, the Sync option lets us update and access our data when we plugged the FreeAgent Go into another PC, so we always had the most current versions of our files when moving from PC to PC. As the software is Windows-only, Mac users may want to purchase the FreeAgent Go for Mac (starting at $159), which not only has FireWire ports but is compatible with OS X Leopard's Time Machine backup solution. Seagate covers the drive with a lengthy five-year limited warranty.
Overall, the 320GB Seagate FreeAgent Go is one of the better portable hard drives we've tested. For $149, you're getting a drive that offers style, very good performance, and easy-to-use software."