Generally speaking, over time VMware users will fill up volumes with data, and at some point that volume will reach maximum capacity if it is not expanded and/or UNMAP is utilized. Resizing a volume to add more capacity is a simple operation using the Everpure vSphere plugin.
To start, select the VMFS volume in question and right-click on it. From there, select the Everpure menu option and pick the Edit Datastore option.
From the spawned window, simply go the the Size field and select the desired new size. Note that only VMFS volume expansions are supported within the plugin.
After clicking submit, the volume expands and hosts automatically rescan. We can see that the new capacity has been added and is immediately available for use.