Ok so i have a 16 gb iphone and i want to fit 7 gb of music on there. I have 5 gb of photos and 4.9 gb of messages! i am going to remove all the photos, but whenever i delete my messages they come back. I have some conversations with my friends that id like to keep, but other than that i want to delete everything else and I'm positive it will free up a lot of space. how do i do this properly?