Carbon Copy Cloner is a great utility that's saved me a few times over the years. I've always used a much larger target drive than the source so I've never run into this problem before.

Now I have a 1 TB source and a 750 GB target drive. Only ~300 GB of the source drive is actually used?

Will this work?

1 Answer 1


Yes - CCC copies by file and so will manage.

This was my original setup and worked. It is now more complex as I now have more data on the source than can fit on the target, I manage this by choosing the files in CCC and deselecting ~/Downloads /tmp etc.

  • Just confirming that this did indeed work as described.
    – boehj
    Jul 22, 2011 at 9:13

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