I noticed something when I switched from iPhone to android. I had the same amount of music on the iPhone and it took up like 8 gb. The music came from my iTunes and went to the phone and I didn't do any kind of file converting. When I got the android I took all the music and put it in a plane old folder and loaded the music from the folder directly onto my androids SD card. The same amount of music takes up 3 gb and the sound quality is the same.