dbfiles is a plugin that enables storage of files to the MySQL database. Why store files in a database? Short answer: it is easier to handle file meta
Question: - Do I really need to use this plugin? Answer: - No. You could use the built-in file upload method, but your files will be put in your filesystem, instead of in a database.
Question: - How can I tell if it's working? Answer: - If you have enabled it, you should see the new tab "Database Files" in the Options page. You should also get two new tabs in the Manage page, "Database Files" and "Add Database File".
Question: - I have found some bugs or have some feedback, where do I report it? Answer: - http://dev.wp-plugins.org/report/1