Every time a new version of WordPress is released, some people will experience compatibility problems with their sites. These can be minor and easily resolved, or they can be more tricky to diagnose. Either way, especially for non-developers, such problems are a little scary, particularly if they make your website inaccessible or unusable. One way to ease the stress of an upgrade, or to experiment with any changes you may want to make on your site, is to create a sandbox, or testing site. The video below shows you how you can easily do that using free tools.