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.
LOL, that’s the idea all right! I pay $99 year for 2TB of storage, so I’m a happy camper. My Windows libraries, movie storage and such is backed up offsite in addition to local backups.