I am unable to create a disk space trigger

[saibuster]

Hi,

I am using Zabbix 3.4 and I monitor different Windows endpoints using Zabbix agent.
I created many triggers successfully and have been using them for a while with no issues.
However, I recently tried to create a disk space trigger and no matter what I do, I am getting an error message.

Trigger expression: {System test template:vfs.fs.size[{#FSNAME},free].last(0)}<50000000

Error message:

Cannot update trigger
Details

• Incorrect item key "vfs.fs.size[{#FSNAME},free]" provided for trigger expression on "System test template".

What am I missing here? If this is not the way to create a low disk space trigger than I would highly appreciate it if I could be
guided with the correct way.

(See attached screenshot)

[Atsushi]

If you create a trigger for an item discovered with LLD, try setting it as the trigger prototype in the discovery rule.

[J_Adatasol]

Late response, but here's the trigger that I'm using to detect free disk space:

{TemplateName_1:vfs.fs.size[/,free].avg(3600)}<=25000000000