What is going on with my external hard drive?

What is going on with my external hard drive?

I have a WD 2TB external hard drive that I use for video files (mp3 / mp4). It has plenty of space still available. I have transferred files to it and can clearly see the file is there and can play it on my laptop but, when I plug it into my TV, some of the files don't show. All files come from the same source so I don't think that's the issue. Please advise…