I have an iPhone 6S, updated to 10.3 and noticed on the iTunes summary "other" storage had more than doubled from just under 2GB to 4.86GB. And "documents and data" now shows 1.96 GB. I cannot find any guidance on how to delete other data. IMO there is no way the update was this big. What happened? I just updated to 10.3.1 with no relief. Can this be fixed? Any ideas are appreciated.