Re-certified 250GB Auto Backup Clickfree HD225 250GB USB 2.0 2.5-inch External Hard Drive General Features: Red color 250 GB capacity 2.5-inch hard drive 5400 RPM spindle speed 8 MB cache USB 2.0 interface Portable, external drive Driver-free Plug and Play operation Automatic backup for up to 15 computers Bus-powered - no additional cable needed NOTE: ONLY PERFORMS FULL BACK-UPS AND DOES NOT PERFORM PARTIAL/SELECTIVE BACK-UPS.