I'm putting this thread here because it's not a Mac-specific question, even though I'm a Mac guy.... Anyway, I'm looking at digitizing my collection of DVDs (mostly TV series) so I can carry them with me easily while traveling, and as "insurance" in case the original discs get lost or damaged. I did some experiments via Handbrake, transferring some programs to both VOB and MKV file formats. Both play back fine in VLC, but the MKV file is more than twice the size of the VOB folder. Is that normal? Pretty sure they're both lossless, and I used the same settings....maybe I changed audio formats/compression or something.... I've also been told that I can simply make an ISO image of the entire disc, but I'm wondering how compatible that will be with various players other than VLC (nothing wrong with VLC, but....) Don't these files play only if you burn them back onto another disc first? All things being equal, a smaller file size and/or faster process would be preferable. Any advice?