hello My iPhone has become unusable due to full storage taken up mostly by “other” which is taking over 3/4 of total storage. I have cleared all the obvious storage but not helped at all. Is there an app that clears this “other” even if it costs. So I can get my phone back. There is no option of plugging it into a mac with iTunes. I am not doing a factory reset, unless it is my very last option, as I believe there is 3rd party options, just unsure which. I am hoping of an app I can download to clear this.