I’ve tried file transfers from iPhone to other devices and other devices to iPhone. It works when the file is transfered to other devices from iPhone BUT cant make it work other way round. ?? any help

I tried different scenarios … turned on the PIN authentication. YES, i would say when file is sent to iPhone from other devices, it does ask for PIN and all sequence is done BUT it never sends that file ??

help required …

And also where should the files be saved as there is an option to enter the path where user wants to save them … wat is the default one ?