@AndroidDev yes and there is a link at the end of that ;=)
c/p: Okay this is interesting. Apparently they were being recognized as audio/visual files based on the file extension but were actually this .mts file megasoftware.net/webhelp/walk_through_mega/…
@craftxbox yes with a couple of comments: defragging on linux only occurs when a partition is 95+% full. If you then clean up your system and a defragged file is actually moved it will undefrag it.
But the biggest thing: defragging ext does not speed things up.