CMS Peripherals UABS2-20 External USB 2.0 4200 RPM 20 GB Auto Backup System Partitions and formats the ABSplus drive to reflect your computers hard drive. ABSplus automatically scans your source drive and copies only those files that have been changed or newly created since the last backup was performed. Provides users with easy ways to recover from even the worst data catastrophe. FastSync feature monitors selected folders for new or changed files and backs them up in the background while you work.