… that’s a big game… and no, I don’t want to “edit files”. It’s just that quite often, in programs or OS (like windows itself…) to have “leftovers”, ie, temporary files or update packages that should have been deleted and are not.
There are no temporary files there and you need on average 512GB or bigger SSD to have WoW + Windows + few other things without killing the SSD performance. 1TB recommended.
And when playing WoW the game actually opens those big archive files and creates temporary files so it uses bit more than what’s installed.