Enable quick access to four 2.5"/3.5" SATA HDD over USB 3.0 or eSATA. The SATDOCK4U3 USB 3.0 4-Bay SATA Hard Drive Docking Station is a convenient, time-saving storage solution for 2.5-inch and 3.5-inch SATA hard drives (HDD) and 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 SuperSpeed USB 3.0 connectivity (backward compatible with USB 2.0), which supports data transfer rates up to 10x faster than USB 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.