Quote:
Originally Posted by Philippe D.
The files could be backed up, but encrypted, and unreadable without the right password - which the person who doesn't want his works to survive would not transmit to anybody. So technically the files would still exist, but for all practical matters they would not.
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This presupposes sufficient expertise on the part of the person supplying the files, and also several other practical factors. For the latter I'm thinking here of what Google and Facebook face when asked to remove user data - so this aspect probably probably isn't relevant to the situation with Terry Pratchett. Even so, it is easy to imagine that copies exist, even if no one yet realises it.