This dual drive SATA HDD Dock provides fast, convenient access to 2.5” or 3.5" SATA (SATA, SATA II, SATA III) hard drives (HDD) or solid state drives (SSD) through either USB or eSATA, without ever having to open a computer case or mount hard drives in an enclosure. Supporting one or two drives (tested with up to 4TB 3.5" and 1TB 2.5" drives per bay), SATADOCK22UE can be connected to the host computer through either USB 2.0 or eSATA - then, it's just a matter of inserting the desired 2.5" or 3.5" SATA drives (or combination of both) into one of the two (or both) docking station slots for instant access.