Zabbix triigger for used space

[Souki86]

"Hello everyone,

I am new to Zabbix, and I want to send email alerts when the hard drive usage exceeds 80% for all Zabbix agents. I have tried using this template and trigger, as you can see in the picture, but it doesn't work. Does anyone have any idea how I can fix it?

Thank you."

[cyber]

So what does not work? Email sending or trigger itself? I don't see anything wrong with trigger expression..

[Souki86]

The trigger isn't working for storage alerts, although I can receive alerts for CPU and RAM.