Originally Posted by Atilla
Link for the StickMount app please geekmaster.
It is a free download in the Google Play store. Just search for "stickmount" on your N7. It needs a rooted N7 to work.
Or Google it. You asked nicely, so I just did it for you, and the top three hits on the first page of my Google search results were these links:
EDIT: There is a discussion on XDA Forums about making a custom microUSB flash device by cutting apart and soldering together parts of a microUSB plug and a tiny microSD socket, to get a physically very small storage device that plugs into the Nexus 7 microUSB socket: