My Book Premium ES Edition External Storage Solutions 320 GB, Dual Interface
Easy to set up, easy to use - Installation is a snap because you don't really "install" this drive, you just plug it in and it's ready to use. There is no CD to install; the included software loads from the drive the first time you plug it in.
Dual interface - USB 2.0 -- For convenience and compatibility among multiple computers, USB 2.0 is the way to go.
eSATA 3 Gb/s -- The ultra-fast eSATA interface gives you speed comparable to a state-of-the-art internal hard drive. This is the future of external storage made available today.
PC and Mac compatible - Works with both Windows 2000/XP and Mac® OS X 10.3 or later
EMC Retrospect Express backup software - Includes Easy-to-use EMC Retrospect Express backup software for Windows and Mac.
Capacity gauge - See at a glance how much space is available on your storage system. (Works with the USB connection only)
Western Digital My Book Premium ES Edition 320 GB. Hard drive capacity: 320 GB, Hard drive speed: 7200 RPM. Width: 144.3 mm, Depth: 56.7 mm, Height: 172.2 mm. Average latency: 4.2 ms, Power requirements: 100-240 VAC, 47-63 Hz, Read seek: 8.9 ms