Using OTG cables with Nexus 7 (2012) without rooting Is it possible to use OTG Cables with Nexus 7 (2012) without rooting? Can Nexus Media Importer be useful here?
Yes, you can use Nexus Media Importer.

From its description:


  This is the only non-root solution for devices that do not provide
  native support for external storage.


Other references:


Usb otg without root access for nexus 7 found!