What is the advantage to making a backup that uses a 'backup file' (please excuse my ignornace on the jargon) vs just copying files to another location. What is that backup file (.bkc, .bkp, etc), is it compressed? Also what is shadowing? I would appreciate if someone could give the quick rundown on backup practices and definitions that would be great. I think I just want to copy files and the incrementally or differentially back them up. This was I can always access the files without having to restore the whole drive. I don't need an image with OS and such.