Questions about Targus USB 3.0 hub + Gigabit Ethernet

It can be connected to a smartphone such as the Samsung Galaxy and large hard drives can also be read with the smartphone. However, the Ethernet connection cannot be used. You have to test whether your dock can do this.

No, unfortunately not. I once saw something similar from Belkin at a trade fair with 2x USB-C and 2x normal USB3.0 ports, but also without an Ethernet port.