I'm afraid I'm not the most computer savy user and am a little stumped about ISO and VOB files. I'm looking to back up my DVD collection onto my hard drive in a format that has the same quality (or close to as possible anyway) as the original disc. These in particular do not need to be readily available for playback. I will also be converting a portion of these into WMV in order to be able to play them on my xbox. Sorry for the essay, but if you're still reading I suppose the point is this: It is my understanding that ISO or VOB are used for this purpose but I'm not sure. Any clarification would be greatly appreciated. Thanks.