Hello, I have all my music files uploaded to Moto e that I received as a gift from grandson. When I plug the phone into my laptop with USB it shows the music files are in the phone, however when I click on the icon to play music it is only showing about a dozen songs. What do I have to do to get all my music that is in my moto e into my library so it will play ? Not computer or phone savy, thank you for any help.