It appears every few times I open the app and the usual android back button doesn’t make it go away, and there is no cancel button. What you have to do is toggle the toggle, then the button will change to “do not back up” and then you can press it. It annoys me how easy this makes it to accidentally turn on backup.
Same. My whole family uses it and we still have half left. I got a ton of 4k video in there too. Not sure what all these people got on their phones to use up all the storage.