this is a DECEPTION NOT MANIFEST it recognizes two hard drives if it is connected in USB 2.0 eSATA only so with a lamentable transfer rate .It Must look far to understand why esata not the only dd connects to the SOURCE location It is because your mother n card is not compatible Port Multiplier !!!!!!!!! This "detail" is KNOWINGLY HIDDEN by the seller and the manufacturer only relatively recent motherboards are compatible;. It came out just before the SATA3.