This was discussed recently. I am new to the Mac platform, but I am a UNIX administrator in my first career so I was determined to research this and get a solution. I have more than 160GB of image files, client contracts, etc, that I want to insure are backed up reliably to multiple disk drives. I went to Apple's web site and scanned all of the Automator actions and found these three that I am still toying with. Backup Folder Compare Folders Sync Folders These all look promising. All have the same author. UPDATE: I have been testing the Backup Folder automator. It works as advertised, but is not very fast. It has been running for several minutes now comparing to relatively small olders (3.77GB) as compared to my production image drive with 160+GB.