Cannot open backup device. Operating System error

Cannot open backup device. Operating System error

Microsoft SQL Server EXPRESS üzerinden veritabanı yedeği almak istediğimde  aşağıdaki hatayı alıyorum.

Backup failed for server ...  Microsoft.SqlServer.SmoExtended

System.Data.SqlClient.SqlError:
Cannot open backup device 'C:\BackUp\DB.Bak'. Operating system error 5(Access is denied.).

BACKUP DATABASE is terminating abnormally.

failed to retrieve text for this error Reason :15105

SQL EXPRESS'de  Backup failed for server Cannot open backup device. Operating System errorhatasının sebebi nedir?

çözüm: http://uzmanim.net/soru/cannot-open-backup-device-operating-system-error/2823