How to attach .MDF file to my MSSQL database

Control Panel V3 > Hostings > Databases
You can refer to the following instructions to attach your .MDF file to your database:
1. Login to your hosting control panel --> Databases --> MSSQL Database
2. Click Actions button
3. Click Attach MDF file to Database
4. You can either upload your .MDF file to your db folder and then select it and click submit button or directly upload it from your local by clicking Upload a MDF: