How to make backwards-compatible 360 games see Xbox One storage?

The Virtual Xbox360 is not able to use any external storage devices connected to the XboxOne.

As outlined in the Xbox One Backwards compatibility FAQ, the Xbox360 shares saves with the Xbox one via cloud storage. This is because it's the storage the 360 has access to.

How do I pick up at the same place in a game on Xbox One where I left off on Xbox 360?