HGST LifeStudio Mobile Plus 500GB USB 2.0 Portable External Hard Drive w/ 4 GB USB Key, Graphite (0S02723) Easily find, organize, and share your files using a stunning, interactive 3D interface Includes detachable auto-sync USB key for ultimate flexibility on-the-go Protect your files with two levels of reliable backup: local and online Includes USB dock for drive and USB key enabling easy access to your content without fumbling with cables Small size makes it convenient to take with you