Creating a databases manually is related to manually installing a website.

1. Log in to your Plesk Control Panel (for the first time a pop up cookies will appear at the top, click Accept all cookies.);
2. Click the domain for which the database will be created;
3. Click databases;
4. Click Add Databases;
5. Enter databases data:
6. - Databases name (according to your wishes),
7. - Related site (select the domain to be associated with the databases),
8. - Tick Create a databases user,
9. - Databases user name (according to your wishes),
10. - Password (according to your wishes or click Generate to generate a password automatically),
11. - Confirm password (according to what was entered above or just skip the bar above you click Generate),
12. - User has access to all databases within the selected subscription (no need to tick or up to you),
13. Click OK and wait for the databases creation process;
14. Done.