Upload & Sell: Off
You can do the exact same thing with the Nexus 7 (rooting/USB OTG with a flash drive/etc.).
I would go with the Nexus 7 because the updates come straight from Google, so you'll get bugfixes, patches and performance improvements as Google develops them instead of waiting for Samsung, who has not always provided timely updates - and sometimes, will not provide them at all.
I have a Nexus 7 and have been very pleased with it. I've owned a few other tablets, and was not nearly as happy as I am with the cheap N7.