The 500GB Replica Portable Hard Drive from Seagate is a bus-powered hard drive, designed for use as a backup drive for Windows systems. The drive creates an exact replica of your PCs hard disk, which is updated continuously when connected. This realtime backup solution ensures that you will not lose data in the event of a hard drive crash.
Older versions of files are kept as long as there is room on the drive to do so, allowing you to recover a file that may have been recently deleted by accident. Most importantly, no user intervention is required for the Replica to function: simply set it and forget it, the backup drive does all the work.