This is a backdoor way to get you to give up using all of your mp3s or make it so that you can only use them on your mac...that is if you want to download songs from AM that you paid for each month to your iOS device. It's kind of shady honestly. I just noticed that AM is designed to only let you use iCloud music and if you try to put your mp3s on it you will automatically turn off iCloud music and then you won't be able to store the songs you streamed on your device. It's kind of a HOT mess TBQH. I hate to say it but this makes Apple's streaming service almost unusable. Now I'm starting to think I have to use Spotify and not AM.... The value proposition for AM is that I could mix all of my streaming bought and mp3 songs together into one playlist. I clearly am not allowed to do that with Apple Music. It's really unfortunate.