I have experienced very odd behaivor on new 2 discs from Sony. Hell Boy and Ghost Rider. It should be noted that both of these discs are near the max size of 50 gig which is why I suspect that size is the issue. When playing either of these discs from a USB2 HDD I appear to be getting stop action viewing only a frame here and there while the audio continues on. This appears to be because the data stream can not get across the bus fast enough to maintain fluid video. It is ONLY apparrent on these two discs at present. I suspect that Sony, in an effort to make its discs as large as possable, to hinder up and down loading as well as make copying VERY EXPENSIVE, is using as little compression on them as it can. Add to the fact that these external HDD's are most likley not the fastest, though they were the cheapest I could find, and I end up with films that are properly ripped but not watchable unless I burn them to dual layered disks which would cost more than the original films, or copy them over to a local fast HDD. I have done this as a test and then the film works fine. Sony has announced that all its future films will be dual layered and I believe that this may well be the reason. Sony marketing will no doubt assert that the less the compression the better the picture. However in real life we know that there are much better algorhythems than MPG2 that could be used today. The single layered BD' and HD's I have watched on my systems are just as sharp and clear. Can anyone else think of why this would be? And before you ask I have a VERY fast system with lots of memory and both single layer BD and all HD films play just from any of my drives including this specific external one.