First, if USB sticks are out for data exfil reasons, 4G sticks (and anything else that isn't a HID device) are out as well. Second, such networks generally hav

First, if USB sticks are out for data exfil reasons, 4G sticks (and anything else that isn't a HID device) are out as well. Second, such networks generally have an approved way of getting data on to them, typically involves handing your USB stick or DVD to someone with access to a particular machine with unblocked ports and specially firewalled off access to a particular shared drive on the network, and nothing else.