The following are the possible causes that a backup storage cannot be added. Make sure that you check whether:
- For SFTP backup storages and ImageStore backup storages, the SSH port number, user name, and password have the sudo permission.
- For Ceph backup storages, the distributed storages work properly. Check whether the Ceph IP address, Ceph SSH port, user name, and password have the sudo permission, and Ceph clusters can work properly.