To make a Database Copy in Plesk, please follow the following steps :-
1) Login to Plesk control panel.

2) Click on "Subscriptinos" and then Click on "Manage Hosting" in front of the domain whose change the Database user password


3) Click on "WebSites and Domains".

4) Click on "Databases".

5) Click on "Database Name".

6) Click on "Make a Copy"

7) Click "Create database with name" and click on "Click a full copy" and then click Ok.

You Will also receive a notificaion in your Mail.
