Nexus Media Importer allows you to import and stream music, video and photos from a USB flash drive or SD card connected to your Nexus 7, or other Android 3.2+ devices that do not support mounting external storage. Google choose not to allow USB/SD Card access on the Nexus series. This software works-around that issue. Requires the following hardware. 1) A USB OTG Cable (Cost approximately $1 USD on Amazon), 2) A USB Flash Drive or USB SD Card Reader and SD Card.
-Attach the OTG cable to the Nexus or other device
-Attach your USB device to the OTG cable
-Select the file. The selected file's name appears in the preview window (currently only photos show preview).
-Click the play icon to stream or the save (disk) icon
-If save is successful, you can click the download notification to view it or see it in the Downloads app.
-DOES NOT REQUIRE ROOT!