Enable quick access to four 2.5"/3.5" SATA HDD over USB (Universal Serial Bus) 3.0. The SATDOCK4U3 USB (Universal Serial Bus) 3.0 4-Bay SATA Hard Drive Docking Station is a convenient, time-saving storage solution for 2.5-inch & 3.5-inch SATA hard drives (HDD) & solid state drives (SSD), that enables you to connect up to 4 SATA drives through a single host connection, while controlling the power status (on/off) of each individual drive independently from the rest. The hard drive docking station features Super Speed USB (Universal Serial Bus) 3.0 connectivity (backward compatible with USB (Universal Serial Bus) 2.0), which supports data transfer rates up to 10x faster than USB (Universal Serial Bus) 2.0. The docking station also offers dual built-in, variable-speed 60mm cooling fans with manual control (including off). Double the value of this hard drive docking station, by using a SATA to IDE hard drive adapter (SAT2IDEADP), which enables you to use any 2.5 or 3.5in IDE hard drive in a SATA hard drive dock slot.