Not sure if this helps but I’ll give it a go.
When I am running wirelessly, my WD bug has a static IP address of 10.1.1.5 (my router is 10.1.1.1)
Other settings for this are picked up automatically as subnet 255.255.255.0, gateway as 10.1.1.1 and dns 10.1.1.1
So, wireless connnection from PC to WD Hub works fine.
In the Network & Sharing Centre, go to Change Adapter settings, and go into the Local Area Connection properties. Go to the TCP/IPv4 field, and Properties, and set this up to have a static address on the same subnet. For eg 10.1.1.4 subnet 255.255.255.0 gateway 10.1.1.1 preferred dns 10.1.1.1
Plug laptop into WB hub via ethernet cable, and on the hub itself change the connection from WIRELESS TO WIRED (no change in settings).
The great thing about this is you only set it up once. As you unplug the ethernet cable, set the Hub back to wireless. Plug it back in, set the connection to Wired for your large file transfers. Easy as