The Icy Dock MB877SK-B mobile rack is an excellent tool for speeding up system management. The Icy Dock MB877SK-B is compatible with SATA I & II HDDs, but the latest updated version now includes support for SATA III 6Gb/s HDDs. Heat is not an issue for the Icy Dock MB877SK-B, with an aluminum body dissipating heat and a 40mm exhaust fan at the rear pulling out the hot air. Using a tray-less design, the MB877SK-B makes HDD swapping easy and fast, you can even do the entire operation using only one hand!