Backup data on a faster hard disk with a monstrous capacity — Western Digital Elements 320 GB external hard drive. The portable Western Digital external hard drive has a 7,200-rpm rotational speed, which boosts reading from and writing to the hard drive. This 320 GB Western Digital hard drive boots your OS faster, and loads applications much quicker. The Western Digital Elements 320 GB external hard drive’s ample cache memory, and faster average seek time make for reduced power consumption, and generating lesser noise and vibrations. Connecting via a USB port, this Western Digital external hard drive provides a very high data transfer rate. The Western Digital hard drive can be installed in — Windows-based, or Apple Macintosh — laptops as well as desktops.