Internal SATA RDX 40GB System, Cartridge and Dock - The Imation RDX Removable Storage System is designed to protect your business's valuable assets. It uses a rugged, removable disk cartridge and docking station that backs up just like a tape drive. Yet its speed makes it a smart replacement to 8mm, VXA and DLT performance tapes. In fact, the Imation RDX Storage System is able to back up more than 125GB of data per hour and allows you to access files instantly. Cartridge capacities range from 40GB to 160GB, making storage options extremely flexible. And you'll never run out of storage space, simply add more removable cartridges as your data needs expand.