Ok so I have a 16GB iphone 5s but I keep getting the low on storage message. After looking at the usage stats it just doesn't add up. As you can see from this screenshot it says I have used 11.6GB and have 515mb left. Looking at the stats I can't see where 11.6GB have gone? Music 2.5, Photos 1.1 and it gets smaller from there. I only have 8 smaller apps beyond that screenshot! What am I missing folks?