It says My iPhone 5s storage is full, but I've barely used 2 out of my 5 gigs. How can I fix this?

It says My iPhone 5s storage is full, but I've barely used 2 out of my 5 gigs. How can I fix this?

Read more: It says My iPhone 5s storage is full, but I've barely used 2 out of my 5 gigs. How can I fix this?