I bought this to increase the USB ports of my OUYA console on two. If the receiver is connected to the Xbox controller, you can connect no more disks. The memory of OUYA is limited and I did not want any active hub, no additional power supply. So I opted for this. For the recipient, and one 2.5 "external drive is sufficient. Both are recognized prima I wanted. The memory card slot is located by the way in the USB connector itself, on its inside.