When I first got my phone, I just used the software from Mototrola to sync my music on to my phone (I use Google Play for music). I've now found out how you can just download it straight from the Google Play website and on to your phone. I like this a lot better and would like to switch to this method, but all of the music that I synced using MotoCast is still on there and taking up a ton of space, so that I can't put all of my new music on through syncing with Google Play. Does anyone know how to delete music from the Google Play app that's stored on the phone? I would greatly appreciate it. My phone isn't rooted either by the way.