Clickfree HD20373 2 Terabyte (2TB) USB 3.0 3.5" External Hard Drive w/Automatic Backup Clickfree HD20373 2 Terabytes (2TB) USB 3.0 3.5-inch External Hard Drive General Features: Black and gray color 2 Terabytes (2TB) capacity 3.5-inch hard drive USB 3.0 / USB 2.0 interface Portable, external drive BackupLink - multi-computer backup Smart Backup Smart Migration CD/DVD Archiving Smart Restore Smart Viewer Music Manager Driver-free Plug and Play operation Automatic backup with scheduling