The 9.5 millimeter high 20G-byte Travelstar 20GN is aimed at ultra-portables, while the 12.5-millimeter 30GT model is aimed at mainstream notebooks, IBM said.
The new G-DRIVE slim leverages Hitachi GST's rugged, 7mm Travelstar(TM) Z5K320 drive, making it the thinnest, 2.5-inch external hard drive in the world.