The Western Digital My Book Essential Edition model is a high-end external USB 2.0 hard drive. It is designed for both in-home, and portable use. The Essential Edition hard drive is about the size of an average paperback book and will take up about the same amount of space. It features an available 1TB (1,000GB), 750GB, 640GB, 500GB or 320GB storage capacity, with a 16mb drive cache and a speed of 7200rpm. Additional features include install-free automatic plug in support for PC and Mac computers, energy efficient functionality that automatically turns the hard drive on and off with the connected computer, and USB high speed 2.0 interface support.
