Edit: I’m on Mac.
So basically first folder is ‘S01E01’ and it contains S01E01.mkv, second folder is ‘S01E02’ and it contains S01E02.mkv, and so on.
Is there some easy way to restructure this into just 7 ‘season’ folders containing the episode files?
Not sure why you would want to do that. Best is to simply make a TV folder and in that a single folder of the name of the TV Show and name every episode “TVShowName S01Exx” and so on. This way when you decided to start using Plex or Emby you are already in the correct file name system.