After the change is saved (using the change button near the workgroup settings) and the screen repainted you should see a reboot message and button (or warning if you are recording) at the top of the screen.
IF samba is running (services tab) then you can manually enter settings for a network drive (Don't browse) enter \\ipaddress\Media as the share name. This should also be possible using foxsat-hdr in place of the ip address. Normally I get this by a click with the right mouse button while on the Network icon.
Which browser and version are you using, also what version of windows?
If you have browser access don't play with the network settings - they are OK.