First of all, the hub of usb 3.0 all in 1 hdd docking depends on the number of ports, the more can be up to eight in one, etc., the low can also be two in one, one to one, depending on consumer demand, for example A simple example is that some have only type C in and then connect three USB type A 3.0 ports. This is a three-in-one. When communicating with customers, it is recommended...