Hello all,
I was hoping to be able to set up a simple alert for my servers which would tell me when they have less than 10% disk space available.
I had a look on these forums and found this post made in February 2017 and the Correct Answer says to use the following trigger conditions:

However when I go to create this trigger condition I don't seem to be able to see the same options.
Under the common options menu I don't get the Volume option, I have tried going into Browse all Objects but I can't find it anywhere under there too.

Can anyone help me with this?
Many thanks in advance.