Error:

Error when trying to create a database backup.

Cannot Open Backup Device Operating System Error 5 (Access is Denied)

Fix:

Look for the service SQL Server (MSSQLServer) and see the username under ‘Log On As’.

Add this user to have full control of permissions on the directory of back up by navigating to the folder / properties/ under secirity tab / Edit and give the same username and click on Check and Ad by giving full control.

Sources:

Last modified: March 12, 2021

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