Seagate GoFlex Slim Performance Drive
4.91 inches by 3.07 inches by 0.354 inch
This model recently debuted as the slimmest portable hard drive available, and its thin profile is indeed remarkable. The GoFlex Slim has roughly the thickness of a pencil. Achieving such extreme portability took a toll on storage capacity, however; the drive maxes out at a (relatively) meager 320GB.