The GoFlex Home only needs to be connected to the Internet during the initial setup. This article explains how to proceed from there.
Even though the system requirements for the GoFlex Home include Internet access, the GoFlex Home only needs to be connected to the Internet during the initial setup.
Connect the GoFlex Home to a network with Internet access.
Setup the GoFlex Home either by installing the Seagate Dashboard software or by opening up a web browser and typing http://goflex_home and pressing Enter in the address bar.
Move the drive to a network router that does not have Internet access.
From here, you can install the software on the client computers or manually map/mount the folders on the drive.