If i were you, I would first try some “basic Linux” commands … like:
find . -name *.log from the “/” dir.
You need Shell Access via the Console or via SSH.
Then I would try to delete some of the logs and see the results …
Also If I were you, I wouldn’t do anything of the above with a ZS Box that is working with real traffic … try’m on a “test bed ZS box” 😉
But I’m not you … 😉