I have an Iphone 6, with the IOs 9.2.1 Software. My original storage is of 11.8 GB and now I have only 177MB available. How is that possible when I only have 5 apps and no photos, videos, music at all? Also everytime I check in storage the number of available gb is not the number it should be as the overall of the gb sum doesnt make up for it. Is there a possible solution for this problem?