I am a recent transfer from iphone to Samsung S4. The Smart Switch program made moving my itunes to my new S4 a breeze. I have since set up a google play account and downloaded my music library to the program. Unfortunately, I can not figure out how to upload from the google play account to my phone. I downloaded Android File Transfer software and all it keeps saying (when I plug in my S4 via USB) is to reconnect the phone and make sure it is not locked. I do both and it still will not recognize my phone. Can anyone help? Thanks!