Failed to backup “firstdb” database with “Full” backup type: One or more errors occurred. > Cannot open backup device ‘c:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS2008\MSSQL\Backup\firstdb202008232246.bak’. Operating system error 31(A device attached to the system is not functioning.).
BACKUP DATABASE is terminating abnormally.
Anyone can help me with this ?