I have a 1Gb Maxtor One Touch hard drive hooked up to my 55le5400 right now with a ton of "backed" up movies on it. 99% of the movies/shows play just fine. I was trying to play Daybreakers in 720p and the only audio I could get to play was the directors commentary. I went to the video playback menu and selected the 2nd audio track, but that had no sound. When the exact same file is played on my laptop using VLC media player the sound for the movie is what plays (also used windows media player from W7, same results). I am also able to turn on/off the subtitles with VLC on the laptop but not the LG. Not like I need the subs, but it would be nice. I went through every menu I could find and changed every setting to try and alter the audio track, no dice. I ended up just hooking the laptop up to the LG and watching it that way, but I would rather the LG just do it from the hard drive!