Actually, it's just simple logic. Inasmuch as a photocopy of my face is not my actual face, a download of my personality is not my personality.
Well, given that my argument follows the premise that one's personality is information being processed and nothing more than that, your analogy would have to read:
"Actually, it's just simple logic. Inasmuch as a copy of the PDF of my dissertation to a flash drive is not the PDF of my dissertation, a download of my personality is not my personality."
That assumes that any two personalities are basically independent of the hardware on which they "run." This is DEMONSTRABLY false: personality can be strongly affected by traumatic brain injuries, psychotropic drugs or even long-term health problems.
Digital computers are turing machines: they're designed with parts and components that can be arranged a (theoretically) infinite number of ways, based on a set of rules (software) that model behaviors within the machine. Brains are NOT turing machines: they do not run on software, and most of their functions are the result of mechanical relationships between specialized parts that do what they do because they cannot do anything else. Likewise, you can program a computer to keep track of time, you can even program its interface to resemble that of an analog clock. If you're good enough, you could even create a faithful 3D model of the clock with all of its gears, springs, pallets and sprockets. But since analog clocks do not
actually run on software, then the software that makes the simulation work is an entirely distinct phenomenon from the clock it is based on.
Software is nothing more than a mathematical abstraction that MODELS a real thing; anything in the universe that ISN'T a turing machine doesn't actually run on software, nor can that software be "downloaded" from one medium to another. You can, with a little work, devise a piece of software that can accurately model the behavior of something, and that's basically what "brain uploading" boils down to. But the model REMAINS a model no matter how accurate it is, and most importantly,
your perspective will never shift from that of your flesh-and-blood body to that of the machine copy (the copy will have memories of being flesh and blood, but it will never genuinely experience it after it is activated).
By the way, your face is already not your face, all cells in it have been replaced during your lifetime
So what? It's still my face. Just like "My dinner" becomes "my dinner" when I buy it and ceases to be my dinner until I either puke it up or take a shit. Just like "my car" becomes "my car" when I buy it and then it ceases to be "my car" when I sell it to someone.