My 64GB 6S+ keeps giving me messages that I am running out of space. iTunes shows me I have 14.79GB of free space after syncing it via a cable. My iPhone show that I have 897MB available, which I sort of don't believe because I just transferred over tons of videos to my Mac and deleted them from the phone and this amount did not change. Anyone know why there is this discrepancy between what my Mac/iTunes thinks is available and what the iPhone thinks is available? Thanks.