HP RDX320, StorageWorks. Type: RDX, Compression ratio: 2:1, Compatibility: HP RDX 320GB Cartridge HP RDX 500GB Cartridge HP RDX 1TB Cartridge. Native capacity: 320 GB, Compressed capacity: 640 GB. Data transfer rate (max): 60 Mbit/s. Colour of product: Black. Host interface: USB 2.0