I have an iPhone 4s w/16 Gb memory out of the 16Gb it says I have 755Mb Available. So I went to iCloud, purchased an additional 10 Gb of iCloud storage. as I try to download an hour movie to my iPhone, it says not enough available storage, then directs me to Settings to manage my storage. There I see I have 15.0 Gb of storage, 14.5 free, can someone assist me in being able to use this storage please? thank You in advance.