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.
I believe they want to process photos and videos to train their AI.
That was in the past, it was the reason they gave free unlimited backups. Now that they have enough data, once everyone got hooked to it, they enshittened the shit out of it