I saw an article about a USB host mode chord for android phones and decided for $3.50 it was worth a try. Holy crap was it worth it. You can connect external keyboards, drives and even a mouse. The system says "Mouse connected" and you get a mouse pointer on the screen that works just like on a computer. Totally worth $3.50 and way easier thqan dealing with batteries, syncing, etc that comes with bluetooth. Plus it is ultra super fast.
Here is the purchase link
I love those plates!