Hi. I've noticed that Windows Backup checks to see IF files on the hard drive have changed since the last backup, and only backs up the files that have changed, but what about sections WITHIN the file?
I have several large VHD files which I am backing up, and it seems that it backs up each ENTIRE VHD file each time, not just the sections that have changed. This ends up taking a ridiculous amount of time to run a backup (and greatlly slows down disc I/O throughput during the backup). Is Windows Backup designed to re-copy an ENTIRE file? Wouldn't it be more efficient if it could somehow only copy the bytes in the file that have changed?