Error codes of SQL Backups

Whenever a Full,Differential and Transaction log backups which are handled through SQL Server Agent those logs also stored at eventviewer of Windows. You can check the information with the below EventID's

The below Event id's trigger when backup jobs got successes.
18270--Differential Backup
18265--Log backup
18264--Full Backup

If job fails the below even id's will get trigger.
995 means third party tool backups have been used.
18210-operating system 995 third party backups or disk space.
18204- Access denied 

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