Membership wide disk space quota and usage details can be found at the top center of the control panel screen.
The Membership disk quota field lists in gb the total amount of gigabytes of disk space your membersip plan provides for allocation. This space is not automatically allocated. It must be assigned to specific resources like User Accounts, Mailboxes, Nextcloud users, or MySQL databases.
The Disk quota allocated field lists in gb how much disk space in gigabytes you have already assigned to your resources. This includes any amount of disk space quota you have allocated to specific User Accounts, Mailboxes, Nextcloud users, or MySQL databases
The Disk usage field measures in gb how many total gigabytes of space are currently used within the space you have allocated.