Wow... I had never checked the option to convert higher bit rate songs to 128 Kbps on my old 3GS. Therefore my music was taking up over 14 gb out of the mere 32 on my phone. Well, while adjusting what I would sync onto the new iP4, I decided to try this setting. My music now only consumes 6.7 GB. that's a big space savings. I wanted to add a couple of HD movies to see what they looked like on the retnia display, so this has really helped..