transfer rate of Super-Speed USB 3.0 interface can be up to 5Gb/sec (Max) Supports Hot-Swapping and Plug and Play function Compliance with Serial ATA Specification Revision 2.6 Backward compatible with previous versions of USB ports (1.0, 1.1 & 2.0) & SATA hard disks (1.5Gb/s) Supports 2.5" Mass Storage Class Drive. (Don't support 3.5" HDD)