What exactly would you use the USB connection for on the Smart hub 2?
Media server/network drive
Is that similar to a VPN?
no
for say storing music/films/tv series and making it accessible to devices on your internal network
Nope.. you can put music/films etc on a USB stick or USB harddrive and share the files all round your house to compatible devices via your WiFi network.
No worries
So would other devices that are connected to the smarthub see the USB drive on their phone under the WiFi settings for that particular hub?
Do I need to add the network manually under WiFi settings or would it show automatically once connected?