https://www.techtarget.com/searchwindowsserver/tutorial/Learn-to-perform-a-DNS-backup-and-restore
Learn to perform a DNS backup and restore | TechTarget
Get familiar with executing a DNS backup and restore procedure to avoid outage that can cause downtime for users across your organization.
backup and restorelearnperformdnstechtarget
https://www.digitalocean.com/community/tools/do-dns-backup-migration
DO DNS Backup/Migration | DigitalOcean
Backup and/or Migrate Digitalocean DNS records
dns backupmigrationdigitalocean