diff --git a/staffeln/common/openstack.py b/staffeln/common/openstack.py
index 13dc05d..4d4827e 100644
--- a/staffeln/common/openstack.py
+++ b/staffeln/common/openstack.py
@@ -113,6 +113,11 @@
         quota = self._get_volume_quotas(project_id)
         return quota.backups
 
+    def get_backup_gigabytes_quota(self, project_id):
+        # quota = conn.get_volume_quotas(project_id)
+        quota = self._get_volume_quotas(project_id)
+        return quota.backup_gigabytes
+
     # rewrite openstasdk._block_storage.get_volume_quotas
     # added usage flag
     # ref: https://docs.openstack.org/api-ref/block-storage/v3/?expanded=#show-quota-usage-for-a-project
diff --git a/staffeln/conductor/backup.py b/staffeln/conductor/backup.py
index 1c69235..e34d681 100755
--- a/staffeln/conductor/backup.py
+++ b/staffeln/conductor/backup.py
@@ -96,6 +96,9 @@
     def get_backup_quota(self, project_id):
         return self.openstacksdk.get_backup_quota(project_id)
 
+    def get_backup_gigabytes_quota(self, project_id):
+        return self.openstacksdk.get_backup_gigabytes_quota(project_id)
+
     def get_queues(self, filters=None):
         """Get the list of volume queue columns from the queue_data table"""
         queues = objects.Queue.list(  # pylint: disable=E1120