As the world's most upgradable portable hard drive–and the core of the GoFlex Storage System–the GoFlex ultra–portable drive gives you the flexibility you need to extend your digital life wherever you go. Plus, automatic, continuous backup and file encryption give you peace of mind that your data is always safe and protected. Form Factor: 2.5" Interface: USB 3.0 Dimensions: 4.39" x 3.19" x 0.57" Weight: 0.33 lbs. Features: Platform Support: PC Mac Features: 192-bit Triple DES Encryption Maximum External Data Transfer Rate: 640 MBps Hot Swappable: Yes Compatibility: Plug n Play USB 2.0 Parts: 2 years limited Labor: 2 years limited