Whether this is achieved through nanotechnology, mind uploading (think, The Matrix) or both.
According to Eastern believe the mind is not the brain.
The mind is intangible while the brain is tangible.
The brain is just a physical organ to store data while the mind exist in the form of energy and is formless.
The brain is located in the head but where is your mind? - your head? your stomach? outside you? inside you?
So how can you download anything where there is no location? The mind is the "fore runner" of your actions