[semach.the.monkey]

The Bluetooth audio doesn't work with my Android phone (Nexus 4), so I bought one of these;
http://www.ebay.co.uk/itm/371021690779
This little £3.49 adapter works great tucked away under the arm rest.

 

[semach.the.monkey]

If I got that too I would need a hub, I already have a 32gb mini stick with all my music on. Only downside is a big muckle list to scroll through.

The USB part is only there to power the device. If you've got a flash drive plugged in already then you could use a cigarette lighter to USB adapter.