Digitalway HS100 Mobile 1.5 GB USB 2.0 Keychain Drive Portable USB Mass Storage installed with 1-inch HDD Ample capacity for huge multimedia and storage applications; Capacity: 1.5GB Capable of fast data transmission through its 2.0 USB port (Compatible with USB 1.1) Enhanced Portability; enables consumers to carry a small and portable device in hand Compatible with Windows 98, SE, ME, 2000 and XP and with Mac OS version 9.X and later