New - one-year factory warranty.

The Mercury On-The-Go Pro 640GB backup hard drive includes a carrying case and USB cable to connect to your Mac. Just plug it up to your Mac, and Time Machine will instantly recognize it as a backup hard drive.

Backing up your hard drive is cheap and easy to do on a Mac.

Are your files and data worth $118.00? Data recovery specialists can charge hundreds of dollars to retrieve your data if you experience a hard drive failure. Buying an external hard drive can avert this cost (and headache).

The majority of Macs we ship have OS 10.5 Leopard or higher preinstalled, which means you can use Time Machine for backing up your data. Time Machine performs hourly, weekly, and monthly backups of your data so you can easily retrieve corrupt or accidentally deleted files. In the event of a hard drive failure, Time Machine can be used to easily restore all of your files and settings to a new hard drive. Setting up Time Machine is as easy as connecting your external drive to your computer. For more information on Time Machine, see the link below.

http://support.apple.com/kb/ht1427