You might also consider asking the respective community.' If you have any further questions regarding these files and if the specific mod/addon uses them for any functionality, you will need to contact the mod creator for further assistance. That being said, Steam Support does not generally provide in-depth, specific assistance for issues encountered while using custom Steam Workshop content. In which case, you should be fine to remove them if they do. bin files, remove them, and test a few addons in your game to see if they still function. However, you can attempt to make backups of these. As the way games utilize addons, or how addons reference files/dependencies can be different in many cases.
However, we can't promise this will be the same for every addon. My Workshop mods seemed to still function correctly without them when I loaded up the game. 'I've gone through a bunch of Garry's Mod Workshop items and tested out deleting the legacy.bin files and the folders containing them in the /steam/steamapps/workshop/content/4000 folder.
