This Iomega Peerless Portable Base Station comes with three removable 20 GB disk cartridges, making it easy to store and transfer large amounts of data. The unit is compatible with both PC and Mac and features a FireWire 400 interface. Additionally, it includes a holder for convenient storage and use. The black color and portable design make it perfect for on-the-go use. Lastly, this unit has a unique feature of removable drive cartridge.  Note: one of the units is missing the reflecter which makes it useable, if a reflecter is replaced then the cartridge is usable.  All parts have been tested and works as it should.