Ok so i couldnt help myself, i had to get to the bottom of this. Lol. I can now say i can successfully connect box via the box plugin and it works really well. A few notes though, firstly the plugin will upload to box in a users own folder and create a data entry in bubble so you can use it as if the file was stored on bubble BUT if you remove the file it doesnt remove it from box just bubbles data so it seems to no longer exist. Its more or less a upload/download storage with not many other functions. Also the dreaded 50mb upload limit is still there because of the restriction in bubbles elements.
I am in the process of creating a plugin that will give you far more options and also remove the upload limit. It was through hours of referencing the box api to do this that i eventually understood what needed to be done to make the box plugin work.
I will compile an easy to follow manual for the current plugin shortly but keep your eyes out for a supercharged version that will hopefully put an end to the upload cap while including some cool new tools…