Carl transferred some podcast audio from one computer to another and it won't play on the other computer hard drive, just on the USB drive. Rich suspects a format issue. It sounds like it isn't a standard MP3 file, and as such, his Windows mp3 player is having issues playing it. Rich also says he may want to try converting the audio using VLC or Handbrake. Another possibility is that it requires some sort of "key" to play the audio. Or additional components.