I’ve been having major issues with my iPhone 6 running out of storage capacity. I have a modest amount of apps installed on the iPhone & I have the 16GB version of the iPhone 6. I was constantly receiving the storage almost full banner on my iPhone and even when looking at the storage & iCloud usage in settings I couldn’t figure out what was taking up all the space. This tutorial will also apply to iPad as it’s an iOS issue and not an iPhone specific issue. Works well if you keep receiving the message “iphone storage full” and you use iTunes match or iCloud Music Library