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Full backup and archive bits

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There are 7 replies, with the last one on April 22 2013 at 12:42:53 by Gork
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This tells me that files are selected for differential/incremental backups based on modification date relative to the last Full file/folder backup, but that only modified blocks are copied - not entire files.

I'm hoping for some clarification from Macrium here... Is this correct with regard to file backups? And if it is, as it appears to be from @jjdenver's testing, there is every reason to believe that a post full backup defrag would/could indeed alter the size of a later incremental or differential backup - correct? (Assuming the date/time stamp on at least some of the files had changed since the full backup, of course.) I had assumed, as with other file backup software I've used, the entire file would be backed up if any part of it had changed.

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