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

[thinkofparis]

I can’t say thank you enough. You have been a huge help. The videos are currenlty in .MP4 format. So i should convert from .MP4 into a .MP4 format and it will recode the videos and hopefully remedy the issue?  I downloaded Any Video Converter and its still free, so thanks for that suggestion.