RDX is a popular backup media technology that features a removable hard disk cartridge and a docking station for operating the RDX disk cartridge. Features of tape format also have been introduced in RDX backup cartridge technology. The highest capacity RDX cartridge launched into the market offers 1 TB or 1024 GB capacity. HP, Imation and now Quantum are offering high-class RDX disk cartridge solutions. The recording capacity of RDX media cartridges developed by HP, Quantum and Imation are 160 GB, 320 GB, 500 GB, 750 GB and 1 TB. In addition, Quantum and Imation have also developed the 640 GB RDX backup cartridge.