The docking station I bought to 2 hard drives to operate independently, which also works in principle, with the small reservation, the succession, only the last inserted is available during insertion of 2 HDDs, but is displayed with the label of the first. Otherwise, the docking station serves its purpose perfectly, currently only on USB 2.0 because I still do not have a 3.0 controller. But even with the USB2.0 docking station is faster than a similar docking station from another manufacturer.