1- Open Enterprise Manager
2- Find The Database you want to Backup(by expanding SQL SERVER GROUP > SERVER > DATABASES)
3- Right Click on the Database to get the popup menu
4- Go to "All tasks"
5- select "Backup Database..."
6- on the "GENERAL" tab..
.Desired Database is already Selected, if not, select that
.U can choose the backup type, by default "COMPLETE" is selected
.Click on "Add..." button to give the path u want the backup to be saved
.Choose the Path and append filename
. Now click on "OK", Now u r back to the "GENERAL" tab
. Click on "OK" again
Rest would be taken care of the Enterprise Manager.
On Completion of Backup you Will Get the Messege.