Review on BYEASY 7-Port Powered USB Hub 3.0 with Power Adapter and BC 1.2 Charging Port – Ideal for iMac, MacBook Pro/Air, Mac Mini/Pro, PS4, Surface Pro, PC, Laptop, and More by Joel Gumbiner

I bought this BYEASY Powered USB Hub 3.0 7 Port USB Hub with Power Adapter. I am using it on a new Lenovo Legion Y7000 laptop with Windows 10. I have connected 4 USB hard drives to a 7 port USB hub and I can only see 3 of the 4 hard drives. What good are 7 ports if I can only use 3 ports? Another issue is that the hub doesn't support my standard USB optical mouse. When I plug a mouse into a USB hub, my laptop doesn't recognize it. When I plug the mouse directly into the USB port on my laptop, the mouse works fine. The mouse is rated at 5V and 100mA, well below the USB port specification.