iPad unable to update ios 9.3.5
So, I go to settings, general, updates, install now. On the bar that I tap on that says "install now", all the way to the right it just keeps spinning and won't update. This is a 3rd gen iPad. If you know what i should be doing, I would love some feedback. My iPad has gotten so slow and drags and I am hoping this update will help fix that. Thanks!