backup and manual vs piracy

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Of course you could sell the backup, that is the whole point of a backup: as a replacement for the original disk in case something happens to it.

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Maybe that is the case in your country but not here.

In the same way as you can sell the original if you destroy  the backup, you are legally entitled to sell the backup if you destroy the original.

[Minuous]

Australia unfortunately.

[Minuous]

Exactly, you are buying a licence rather than the media itself, as the software publishers take pains to point out. They can't have it both ways. Fair use includes the right to transfer the work from one media to another.