I go in the filesystem in my dropbox on my iPhone occasionally, like some of the Apps I have which are designed to work with it.
I use the filesystem on Android when people who don't know how want to back up their stuff, I wish it was always in the same place, it's tedious figuring out which icon represents what and whether it's in applications or not.
Then we have a device which transfers data between phones, most of the time you have to manually select the phone as it isn't recognised then you have to enable developer tools, USB debugging and stay awake to get contacts THEN turn USB debugging off and enable Mass storage mode to get other stuff, off course those things move around too depending on manufacturer and model and pop up a continuous stream of errors.
iPhones you just plug in they get identified and you pick what you want to transfer, the only setting you change is auto-lock to "never".
The number of people who don't know or do anything about backing up their phones is extraordinary.