Currently, I have a network setup that kind of duct-taped together. I have A.) The wireless DSL modem with four ethernet ports and a USB 2.0 port B.) The wireless router with four ethernet ports and a USB 3.0 port C.) The 25 port switch to which all of the computers are connected.
The computer hooked to the wireless have a choice of connecting to either the modem or the router.
Here is a picture I drew up
My goal is to have both the wired and wirelessly connected computer be able to access this external USB 3.0 hard drive.