1. Login to Plesk
2. Click menu Backup Manager
3. Click More Actions > Database Backup Repository
4. Under Tools menu, click Backup
5. You're now on Backup Setting page:
- Choose the database name that you want to backup
- Name your database backup file (for MSSQL database, you can fill with .bak extension, like : mydatabasemssql_backup.bak)
6. Click OK
7. Once it's complete, you can download your backup file to your local computer.