Because despite being an IT-Genius he apparently doesn't know the difference between Cut&Paste and Copy&Paste.
That's the one thing that really bugs me about the movie.
David cgc wrote:
It's a common conceit in Sci-Fi that AIs need to be transferred, as opposed to copied. It happens all the time in movies, shows, novels, video games...
Yeah; that's exactly what they did on Voyager every time the holographic Doctor was "stolen."
And it's really too bad, because it would be so much more interesting to explore what the implications would be of a life form that could be copied, backed up, deleted, recovered, and saved in multiple versions like a real computer file. There would be a lot of messy questions that could make for some interesting stories.