The Storage tab summarizes storage availability and other storage metrics.
The Storage tab is shown for all nodes, each site, and the entire grid.
Storage Used graphs
For Storage Nodes, each site, and the entire grid, the Storage tab includes graphs showing how much storage has been used by object data and object metadata over time.
Note: The total values for a site or the grid do not include nodes that not have reported metrics for at least five minutes, such as offline nodes.

Disk Devices and Volumes charts
For all nodes, the Storage tab also contains details for the disk devices and volumes on the node.