Seagate FreeAgent Pro 320 GB 3.5" USB 2.0/eSATA External Hard Drive 320 GB external hard drive connects to your computer via USB cable or eSATA 7200 RPM spindle speed for high-speed performance and fast read times Continuously copies your content to multiple locations; Automatic revisions of your content help keep you safe from goof-ups Share pictures online and automatically update without thinking about it Includes external drive, Free Agent software (preloaded) and electronic documentation; 5-year limited warranty