code: def create_storage(self, size=10, tier='maxiops', title='Storage disk', zone='fi-hel1', backup_rule={}):
          
          body = {
              'storage': {
                  'size': size,
                  'tier': tier,
                  'title': title,
                  'zone': zone,
                  'backup_rule': backup_rule
              }
          }
          res = self.post_request('/storage', body)
          return Storage(cloud_manager=self, **res['storage'])
docs: Create a Storage object. Returns an object based on the API's response.