Just got my Galaxy s3. I am an admitted rookie trying to figure it all out. I just signed up for Spotify as Music Hub not available in USA yet. How do I use Play Music in conjunction with Spotify? I can listen to Spotify, but want to create additional folders, etc. with Play Music. I downloaded a playlist from Spotify, which I listen to on my computer, but I don't understand how to incorporate it into Play Music app. How do you get music into Play Music app?