Those settings shown in the picture will work fine. You've got all tables selected, SQL format, data and structure included. Looks good. I have made backups with phpmyadmin before and the appropriate settings are usually selected by default. You just select all tables and go.
I would select Add Drop Table. This way if a newer DB modified fields, when (if) you decide to Import your back-up, the importing process will drop any existing tables to replace them with the copy you are importing.