I'm not sure what anyone else uses in OSX for back up, but I find Lacie's SilverKeeper very easy to use. What I'm wondering about backing up in OSX is what hidden files might not be going through. In other words, is backing up my "home-csonni" a total backup, or is there a more thorough app that picks up hidden files in OSX that SilverKeeper might not? What about the Library folder? Is there any hidden files that SilverKeeper might miss?