Can somebody explain the rationale as well as the advantages/disadvantages of backing up Blu-Ray to ISO image versus file structure? I'm looking to back up my Blu Ray discs to my HTPC. For my dvd's, I simply used Dvdfab to back up the dvd to vob files. However, most of what I read about backing up blu-ray recommends ISO format, which seems like an extra step. My concern with ISO (and clearly I don't fully understand the concept) is that this seems like a "workaround" because some media players don't permit file structure playback. If that's sthe case, I would prefer to rip the files and wait for technology to "catch up." Sorry if this seems naive, but any input is appreciated.