VMware datastore threshholds, not enough informaton to complete

VMware datastore threshholds, not enough informaton to complete

I am trying to configure an OpManager datastore monitor and I do not see enough information at ManageEngine.. I am using these instructions:


But I need to fill in the threshold values and there is no indication on what is an acceptable value. I assume this is disk space but what is the format of the value? Is there additional documentation?