TechRadar checked out this compact 320GB HDD and concludes it's a pretty ideal companion for the MacBook Pro.

"Currently an Apple Store exclusive, this portable USB drive is based on Hitachi’s Travelstar Z5K320 HDD. At only 7mm deep, it’s around 36% more space efficient than standard 2.5-inch drives, allowing for a casing that’s less than a centimetre thick. The G-Drive Slim 320GB boasts a robust, stylish build, with a solid aluminium enclosure bound by a black rubberised border. In common with other G-Drives, it also has an attractive desktop icon."



Link: TechRadar