Microsoft SQL Desktop Engine (MS SQL 2000): How to Backup database?

1. Run Microsoft SQL Desktop Engine
2. Start -> Type cmd and push enter
3. Use bellow command
osql -E -S COMPUTERNAME\DATABASE -q „BACKUP DATABASE mydb TO DISK = ‚D:\MSDE\Backup\mydb.bak'”

Source: http://support.microsoft.com/kb/325003/pl