I don't get it, how this auto deletion works. I can set it in my setting and then images gets deleted automatically, but I don't find pre-upload edit place where I can edit auto delete in one specific uploaded image.
Is on the same modal box where you edit image size. If isn't there is either because the feature is disabled or because you are missing the theme snippet.
I really think there are many functions that the new user Chevereto not know they are there or are hard to find. Everything has to be in view (album creation, change the privacy of the images, etc.).