I'm new to this so, apologies in advance. I have a Panasonic Lumix 10 camera - no comms capability, (except via a USB cable), and a Samsung Galaxy Ace 2 smartphone. I would like to connect them directly to my Nexus 7 to download photos, messages etc as USB devices. I've bought a USB cable that will connect these devices together but the Nexus 7 doesn't recognise either of them. Would appreciate any ideas how to do this or even if it's possible. Thanks.