How to make differential backup without using archive attribute? [closed]

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http://serverfault.com – Plain and simple: I need to make differential backup of my files without using the typical file attribute logic. Possibly with a free software. So the software I need should rely on it's own indexing logic to understand which files need do be backed up. Currently I'm using Cobian backup for doing Full/differential backup. I backup from/to disk installed in my PC. (some entire disks and some specific folders) The issue is that the "file attribute" logic is heavily flawed (this have nothing to do with Cobian Backup, which is a very nice piece of software) The main flaw I've encountered in the (HowTos)