Cloud Sql Download Backup !exclusive! Guide
If your export fails, it is usually a permission issue. The Cloud SQL instance has a unique "Service Account" email address. This account must have or Storage Object Creator permissions for the bucket you are trying to use.
These are managed by Google Cloud. They are automated, incremental, and stored internally. You cannot directly download these files to your computer. cloud sql download backup
Always encrypt sensitive database exports, especially if they are stored on local hardware or external drives. If your export fails, it is usually a permission issue