Until I signed up for Apple Music, I had approximately 3000 songs synced between my iPhone, iPad and MBP. Once I signed up, I had to go in and tell Apple that I wanted to download all of the music to my phone so I had access to it offline. I can't get through 3/4 of my music before I run out of storage on both i devices (64gb) when I never had anything close to this prior to Apple Music. What am I missing?