A couple of suggestions:
Go to Amazon and order a Nexus OTG (On The Go) USB cable.
When you get your Nexus and setup your Google Play account, get "Nexus Multimedia Importer" as a ... $3 app.
The Nexus will NOT let you access a USB flash drive unless you "root" your reader. But with the cable and the Multimedia Importer - you can access the files on a USB flash drive. It will even play video files from the USB drive with the software. I was surprised and pleased how easy it was.
Below is the OTG cable I purchased:
http://www.amazon.com/gp/product/B00...ls_o00_s00_i00
I also ordered this case mainly because of the wide, soft wrist strap:
http://www.amazon.com/gp/product/B00...ls_o03_s00_i00
Hope this helps.