Clickfree C2N 750GB USB 2.0 2.5" External Hard Drive w/Automatic Backup & Network Support (Black) Clickfree C2N 750 GB USB 2.0 2.5-inch External Hard Drive General Features: Black color 750 GB capacity 2.5-inch hard drive USB 2.0 interface with attached cable Portable, external drive BackupLink - multi-computer backup Driver-free Plug and Play operation Automatic backup with scheduling 256-bit hardware-based encryption Bus-powered - no additional cable needed