Which files should I (not) have in my root directory?
One of the most common issues we see with new clients is the mess of files and directories all over their WordPress servers. This includes info.php type of files, personal storage of videos and photos, and all other types of junk. SFTP is not a storage closet and should NEVER be treated as such. When you FTP into your root directory, the ONLY thing you should see is your core WordPress files, and perhaps a robots.txt and sitemap.xml and that is ALL you should see.