It is important that you regularly back up your data. This will safeguard against downtime due to data corruption or hardware issues.
There's a backup management wizard to help back up your database. You can back up your data to any device available.
Make a backup directly through the SQL interface.
When backing up a database selectively, the name of the database to use is <Database name>.mdf.
See Backing up an SQL database using Management Studio
Contact your system administrator for more information.