Hi @pablosarg,
Let's follow the example I followed so you can tell me if I'm doing something different:
- Access PostgreSQL and create the database and set some example data
CREATE DATABASE jota;
\c jota;
CREATE TABLE phonebook(phone VARCHAR(32), firstname VARCHAR(32), lastname VARCHAR(32), address VARCHAR(64));
INSERT INTO phonebook(phone, firstname, lastname, address) VALUES('+1 123 456 7890', 'John', 'Doe', 'North America');
- Access phpPgAdmin and select the jota database and the table I just created

- Click on data only, select CSV and click on export
Does that work for you?