This is interesting and, indeed, my third level of backup is at least
semi-EMP-proof on purpose.
However, is the Vatican library 45,000 gigabytes of 45 petabytes (those
differ by a factor of 1000)? On my side of the pond, 45,000 gigabytes is
45 terabytes. But here, a billion is a thousand millions. Elsewhere, I
think a billion is a million millions.