I created MP4 files from family VHS tapes. I used handbrake and then movie maker (windows). I loaded the mp4's onto new portable Seagate HD (USB3.0) and then plugged HD into blue-ray player for playback on TV. The mp4's are between 2-9gb in size. I can play the files but if I fast forward and start playing again I lose the audio. I've tried pausing it to see if audio comes back but it doesn't. Are my video files to big? Any other suggestions?