You might have seen those blurry images of the Destiny game box floating around, along with word claiming it requires a mandatory 40GB install on Xbox One.
That's simply not true. If you enlarge the image and battle through the blur you'll notice it says, "Game disk and up to 40GB storage required."
The principle words there are "up to". Watch Dogs carries a similar warning, so nowgamer went through the hassle of uninstalling and reinstalling the disk onto our office Xbox One to see what would happen.