I have a Samsung Galaxy S5 and only recently (2 days ago this started) have I been unable to sync my local files with my spotify phone app. I have both my phone and laptop hooked up to the same network, ive even tried this on multiple different networks, with no difference. I am still able to control spotify on my compuiter using my phone but still the computer says that I have no current devices connected. In the 3 years ive been using the program ive never had this problem, and ive even gone as far as uninstalling the program from both my phone and my computer in hopes this would fix the problem, needless to say, it didnt.