Audio drops from videos when playing USB 3.0 iXpand drive on iPhone 7 and on iPad Air 2

[drlucky]

.mp4 is a container. inside the container several different video and audio codecs can be used. this thread the video codec that was being used in the mp4 container was a non standard codec. this was causing the issue. the work around was to convert the file using a different video codec. if you can drop box us a link to one of the files you are having an issue with we can see if you have a similar issue.