I have almost 2.6 gigs of this documents and data crap on my 6s, and it's getting bigger. It's less than a year old. It drives me nuts. I have no videos, podcasts, music, ibooks, photos nothing on my phone. Nothing in icloud storage, I deleted apps but the docs & data still did not go down in any significant manner. Also, once I start using the app again it goes up again. I cleaned up all my email, sent, deleted, huge files all gone, cleared the data on my browsers, any apps that have the option to clear data I have done it, I have tried every single suggestion here and then some and still nothing..
What is interesting is that my iphone 4 and 6s have basically all the same info, basically the same apps, except on the 4 that is where I have all my music and vids, yet the documents and data on the 4 is next to zero....Even on my 2nd gen ipad I have my email, crazy amounts of vids and even there the docs & data is next to nil. Apple what's up with that...it's almost going to get to a point where all your space is taken up by docs & data...
And it seems the only option then is to reset the phone?!! Yea right, Apple you need to come correct...😠😠😠