I am using an external DVD RW drives playing a DVD movie. Why there is always a delay in playback?

Please check your USB port's specifications. If your system only support USB 1.0 / 1.1 specification, then the transfer rate supported is only 60% of that needed for DVD playback, therefore you will see delay in the pictures. We suggest you upgrade your system to USB 2.0 specification before play DVD movie with your external DVD RW drive.