Even if consciousness is proven to be outside the brain (which I doubt it is), it says nothing about free will. Consciousness in this case is still confined to the natural world and your choices are ultimately determined by the laws of nature. Your conscious activity is due to the laws of physics.
In order to show that the universe is not deterministic and that choices are not the result of natural law, you must show consciousness to be supernatural. It must be outside the natural world itself, not just the brain. Until that is proven, we have good evidence to credit the laws of nature for the condition of the universe.