The My Book Mac Edition from Western Digital can hold 1TB of data and has energy efficient features.

Attention all Mac users: Western Digital has extended its external hard drive line up for Mac with the My Book Mac Edition. This little black box provides a massive 1 terabyte of storage which equals about 284,000 photos! My Book is pre-formatted for Mac, includes a simple USB interface and works seamlessly with Apple Time Machine or other popular Mac backup software. It’s made with a shock-resistant enclosure so it can withstand travel and sports a sleek and stylish matte black finish to complement your other Mac products. RRP: $269.99