This is a simple report that displays GBs used, capacity and % usage for all logical drives because the built-ins weren't quite right. Requires that the volumes be licensed but doesn't use any SAM licenses.
Screenshot:
Datasource is this custom SQL query (updated to fix a potential divide by zero error for 0 capacity volumes):
SELECT n.Caption, d.DeviceID, d.VolumeName, CAST(ROUND(d.FreeSpaceB * 0.000000001, 2) AS DECIMAL(10,2)) AS 'FreeSpace', CAST(ROUND(d.CapacityB * 0.000000001, 2) AS DECIMAL(10,2)) AS 'Capacity', CAST(COALESCE(ROUND(((d.CapacityB - d.FreeSpaceB) * 0.000000001) / (NULLIF(d.CapacityB, 0) * 0.000000001) * 100, 0), 0) AS INT) AS 'PercentInUse'
FROM AssetInventory_LogicalDrive d
INNER JOIN Nodes n ON d.NodeID= n.NodeID
ORDER BY PercentInUse DESC, FreeSpace DESC
