In "Installing and Upgrading" chapter, there is a note that says this:
"A FreeNAS® system can be upgraded by backing up the existing configuration data, performing a fresh install, then restoring the configuration. Back up the configuration with Fresh Install during the installation. After booting into the new install, restore the previous configuration data with .". Choose
This is mentioned right after the installer automatic upgrade is shown. There is no reasoning for why this is shown here, and it is confusing to present an alternate and more complicated method with no reason. This note should be reworked, moved, or removed entirely. It is an expert-level suggestion and does not belong with the simple installer upgrade method.