My wife has an iPhone 6 with 64GB of memory at time of purchase. She has added few apps, has less than 100 pics yet her used storage vs available storage is 66.4GB vs 5.7MB. How can this be a true ratio? I had an iPhone 4S 64GB and I had far more apps and over 3000 pics. My memory was never depleted to that degree. Trying to figure this out?!?