Share via "Add to Secret Box"

This is driving me nuts!!! First noticed "secret box" in share menu when throwing pics into dropbox----- so started looking, if I hit the share option here in chrome browser, there it is too!

It seens to be quite the secret, can't find anything about it anywhere, and I mean anywhere, been looking ever more obssesively all night

Sc attached, please please for the love of Pete someone h

Go Z Is

ave the answer!!!!!!!!!

Oh man oh man oh man, gotta run to photobucket- upload button from device is missing only from web is there