The rules say that the iPhone will only back up to iCloud when it is connected to wifi, connected to charge, and locked. So why is my iPhone constantly trying to backup? Every few minutes I get a message that it can't back up because there is not enough room on iCloud. Why is it doing this, and how can I stop it? I only want it to backup at night, when it is connected to wifi, connected to charge and locked (i.e. when I go to bed at night).