right need some help

bought a bluetooth data thingy for my d500 so i can exchange pics and stuff from my phone to pc and vice versa.

i can see the pics from my phone on my pc but how do you go about getting files off your pc onto the phone

someone must be able to help me before i throw it all in the bin, with the technology about now i just want to plug something and it works, am i asking to much???

p.s my brains hurting now.

swerv