We're so much more than our brains
A top neuroscientist, Miguel Nicolelis says we'll never be replicated by computers:
“The brain is not computable and no engineering can reproduce it,” says Nicolelis, author of several pioneering papers on brain-machine interfaces.
I've always found the notion that you could somehow download the brain onto a thumb drive nonsensical. The brain is such a small component of what makes up human consciousness. Our essence is not just located in our brains. It's also distributed throughout our bodies, as well as outside of our bodies. In a sense, it's everywhere, because our consciousness is ultimately beyond time and space. No way a computer can ever replicate that.