The Filegroup Space Full (Size) alert provides the amount of disk space, in megabytes, currently used by the database as the sum of all the files within the filegroup.
SQL Diagnostic Manager raises this alert based on the database metrics collection interval specified in Server Properties. You can also use advanced alert options such as filters to exclude specific filegroups or databases from alerting results.
You can access advanced filters by clicking Advanced > Alert Filters when setting the thresholds for your Filegroup Space Full (Size) alert.
The Filegroup Space Full (Size) alert is disabled by default.