Setting drive up to be visible on network

Hopefully this is pretty basic. I want to attach my drive to my network so that I can run time machine any time I’m connected. I used to do this with my WD drive which finally conked out so I have a new G-Drive but there isn’t much in the way of documentation.

Anyway, do i just need to plug it in via the USB and then it’s somehow discoverable? Any tips appreciated!