Drobo

The Drobo™ storage robot protects data from drive failure, allows incremental capacity increases, and eliminates the complexities of RAID- based systems. Connects via FireWire 800 or USB 2.0. You can start with two drives and grow to four. To increase capacity, just add a drive, or replace a drive with a larger one. Upgrade any of the drives at any time to increase capacity, with zero downtime, data migration, or waiting to access new capacity. Drobo manages storage so you don’t have to.