Now we could use a 8g thumb drive to play movies on it. However my brother gifted a 3T external hard drive.
It sees some movies, not others, alot of folders on it are no where to be found. However placing the folders inside of the ones it could see let them be visible again but the movies are touch and go. Sometimes they are there, sometimes not, never all of them visible.
All are done in a playable format that I converted them to.
What are the file systems supported by the TV?
What is the file system of the flash drive? What is the file system of the external drive? You can check that out in Disk Management. Some TVs support only Fat32. Your external drive may be formatted in FTFS.
Also, you need to check if the TV has some limitation when it comes to external storage.
They're visible on a thumbdrive but not on the hard drive. I don't think the watchable format I put them in is the problem.
See if there is updated firmware for the player, it may just not be able to read the hard drive properly. Test it with a few other things, maybe a smaller external hard drive to see what works and what does not.