As a futurist who is excited about all the realistic possibilities our future has, this one seems the most unlikely. Science is too far behind here and also has not even a testable hypotheses.
Consider; if we could upload our minds on a PC, that would mean our thinking is digitized, our ideas are virtually managed by a line of code.
Contrast that at current levels of neuroscience, there isn’t even a scientific theory about ideas, at all. Not even close to having anything testable.
Additionally, the majority of science operates on the primacy of the material, “monism”, which dismisses such notions as mind being separate from “brains” at all and to say the could be distinct is “Cartesian dualism” .