The experience to the senses is one thing like he said, but there is sensory experience and what he calls conceptual. That sensory experience has no concepts to it just data. That in reality there is just sensation but no concepts of mountains, cars, trees, bees, etc.
Its like a phrase they say about “enlightenment” that before it there are mountains and rivers, at it there are no mountains and rivers and that after it there are mountains and rivers again.