External database backup: fair enough?

Hello,

In case :

  • we use external database (PostgreSQL)
  • storage is set to DB
  • database is already backup by cloud provider

Do we need to backup filesystem ?

In others words, if we use external database and storage is set to DB, can we consider Zammad pod (Helm deployment) is stateless ? (in that case it could be deployed as a Deployment)

I would like to avoid setting up another backup system if the database backup is already good enough.

Thanks