Hi there,
in the Below link, you can find the instructions for resizing volumes on a Storage Spaces Direct cluster by using Windows Admin Center.
https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/resize-volumes
In Windows Admin Center, connect to a Storage Spaces Direct cluster, and then select Volumes from the Tools pane.
On the Volumes page, select the Inventory tab, and then select the volume that you want to resize.
On the volume detail page, the storage capacity for the volume is indicated. You can also open the volumes detail page directly from the Dashboard. On the Dashboard, in the Alerts pane, select the alert, which notifies you if a volume is running low on storage capacity, and then select Go To Volume.
At the top of the volumes detail page, select Resize.
Enter a new larger size, and then select Resize.
On the volumes detail page, the larger storage capacity for the volume is indicated, and the alert on the Dashboard is cleared.
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