sql server management studio backup error
![enter image description here][1]![enter image description here][2]hello, i want a back up for my database in sql server management studio. i am using ms sql. but when i try to back up , i take the following error:

    ===================================
    
    Backup failed for Server 'ERDI-PC\SQLEXPRESS'.  (Microsoft.SqlServer.SmoExtended)
    
    ------------------------------
    For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1617.0+((KJ_RTM_GDR).110422-1901+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Backup+Server&LinkId=20476
    
    ------------------------------
    Program Location:
    
       at Microsoft.SqlServer.Management.Smo.Backup.SqlBackup(Server srv)
       at Microsoft.SqlServer.Management.SqlManagerUI.BackupPropOptions.OnRunNow(Object sender)
    
    ===================================
    
    To accomplish this action, set property Devices. (Microsoft.SqlServer.SmoExtended)
    
    ------------------------------
    For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1617.0+((KJ_RTM_GDR).110422-1901+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.PropertyNotSetExceptionText&LinkId=20476
    
    ------------------------------
    Program Location:
    
       at Microsoft.SqlServer.Management.Smo.Backup.Script(Server targetServer)
       at Microsoft.SqlServer.Management.Smo.Backup.SqlBackup(Server srv)

and its image:


Its destination comes as tape not disk. i have controlled whether there is a back up folder or not. but i have realized that i have a back up folder: 

    C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\Backup

i couldn't solve this problem..please help..


  [1]: http://i.stack.imgur.com/KQ4ue.png
  [2]: http://i.stack.imgur.com/BAl8C.png
sql server management studio backup error
===

![enter image description here][1]![enter image description here][2]hello, i want a back up for my database in sql server management studio. i am using ms sql. but when i try to back up , i take the following error:

    ===================================
    
    Backup failed for Server 'ERDI-PC\SQLEXPRESS'.  (Microsoft.SqlServer.SmoExtended)
    
    ------------------------------
    For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1617.0+((KJ_RTM_GDR).110422-1901+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Backup+Server&LinkId=20476
    
    ------------------------------
    Program Location:
    
       at Microsoft.SqlServer.Management.Smo.Backup.SqlBackup(Server srv)
       at Microsoft.SqlServer.Management.SqlManagerUI.BackupPropOptions.OnRunNow(Object sender)
    
    ===================================
    
    To accomplish this action, set property Devices. (Microsoft.SqlServer.SmoExtended)
    
    ------------------------------
    For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1617.0+((KJ_RTM_GDR).110422-1901+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.PropertyNotSetExceptionText&LinkId=20476
    
    ------------------------------
    Program Location:
    
       at Microsoft.SqlServer.Management.Smo.Backup.Script(Server targetServer)
       at Microsoft.SqlServer.Management.Smo.Backup.SqlBackup(Server srv)

and its image:


Its destination comes as tape not disk. i have controlled whether there is a back up folder or not. but i have realized that i have a back up folder: 

    C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\Backup

i couldn't solve this problem..please help..


  [1]: http://i.stack.imgur.com/KQ4ue.png
  [2]: http://i.stack.imgur.com/BAl8C.png