Backup DotNetNuke before you upgrade or make changes
If you are planning on upgrading DNN or adding a new skin or module to your live production DotNetNuke site, a best practice is to make a complete backup of the site and database prior to doing any work on the site. Ftp the backup to your local computer. You will need to use the database backup tool to make a sql database (.bak file) backup to restore from. The site files can be found inside the wwwroot directory when you login using FTP download the entire WWW root directory.