Seagate BlackArmor PS 110 500 GB USB 2.0 Portable External Hard Drive ST905003BPA1E1-RK 500 GB, USB 2.0, 5400 RPM Performance Incremental and full-system, automatic backup for PCs. SafetyDrill+ recovery software (Bare Metal Restore). Backs up open files for greater protection. Built with a reliable Seagate hard drive.