Plugin probably only backs up the database. Images are in folders on your host’s server. Might need to use FTP to backup those files.
Review WordPress Backups.
Interesting that when I used phpMyAdmin for another blog with just a few pictures, I saw a disclaimer stating the same thing you are saying but the file generated was of 2.5MB… Should I try phpMyAdmin for this one instead? Which one is more reliable?
Not sure exactly what database backup plugin you using but that plugin and phpMyAdmin are going to be roughly the same type of backup. Your database holds posts, pages, comments, categories, links, tags, and users, in MySQL database tables.
Again you will want to use FTP to backup your site “files” which include your WordPress scripts (code), themes, plugins, and uploads (typically stuff in your Media Library). Your database that holds posts, pages, comments, categories, links, tags, and users, is held in your MySQL database tables.
Some hosts such as most cPanel type hosting have a backup that backup files and databases.
There are some plugins that backup both but I’ve never used one.
Thank you very much! Your information was very helpful!