AirDroid app. transfers files to a location that is not findable using Finder.
Having transferred photos they are listed in the App. and clicking on an Icon shows their precise location on the device; abbreviated its SSD/Myfolders/Library - then about another four sub folders. When looking in Finder there is no "Library" after "Myfolders." Maybe the App. has somehow got the location wrong but it seems to open up Finder and it is as they indicate so it looks like parallel File management systems. This is one of the more bizarre things I've seen with computers; presumably there is some arcane detail I'm unaware of?