I ordered the 10-port hub, because I have a lot of hard drives and the 4 USB ports on the laptop (Dell) were no longer sufficient. The stroke has for independent installation immediately work with all connected devices, including hard drives with unpowered. Exactly what I had imagined! Also with simultaneous copying mehereren hard drives (data volumes over 1TB!) No crashes or discernible loss of speed (except of course by the processor permitting). Other devices, such as DVB-T stick or card reader function properly. On lateral connecting the USB mouse that also poses no problems lies. I chose the white variety. For me, the label has so far criticized as not yet succeeded in others. Value for money is excellent! Highly Recommended!