I own the 16GB Nexus 7 having returned my Galaxy Tab 2 for it. The decision to do so was a no-brainer. The Nexus 7 dwarfs the Tab in performance and screen display.
There is a "work-around" to gain more memory. There is now an App on Google Play that activates the mini-USB port for OTG use.
It works flawlessly on my unit and I use a 32 GB card to feed video or what have you to the Nexus 7.
Around the house or office, it is zero issue to me to have the short cable dangling.
The App from the Play Store
The Mini-USB to Female USB Adaptor
The hyperlink has been disappearing so here it is: http://www.amazon.com/gp/product/B00...ls_o00_s00_i00
Another option is to use a W-Drive