How I wish it were true that all USB is USB.
Many Android devices (all of mine) only do memory through USB. No printers, dongles or even card readers. Various routers had USB sockets, power only.
For the OP, the only thing that USB has done regularly for me is charge stuff. Even then, not all. Does anybody have any camera that will charge when it's connected to a pc for the purpose of data download? None that I have do. My android pad has to be charge by a power plug, when letting it charge by USB would have been nice!
A little known fact is that USB sockets are current limited, which is why some external hard/optical drives come with a lead that has two large USB plugs on one end and a single mini or micro on the other. Whatever the device, you'll get a faster charge using one of these cables. You do need two sockets though.