[htagumjh] Unpowered bulk data

Place your powered data reader next to the unpowered data object.  The reader picks up the data.

Bar code readers (e.g., QR code) and unpowered RFID tags are two ways this is currently done, but the data transfered is at most thousands of bytes.  Is there a way to get more, much more?  Say megabytes in a second.

A straightforward but clumsy possible way is electrical contacts and a plug.  The powered reader provides enough power directly for the transfer.  But smartphones on USB are not expecting to be bus master.

The inspiration was a print ad on the subway: scan this QR code to get a website address for our brochure which you can access as soon as you get network access aboveground.  Far simpler would be, scan this code which contains the entirety of our brochure; no network needed.