The backup restoring function allows you to save the Sophos UTM settings to a file on a local disk. This backup file allows you to install a known good configuration on a new or misconfigured system.
Be sure to make a backup after every system change. This will ensure that the most current settings are always available. In addition, keep your backups in a safe place, as it also contains security-relevant data such as certificates and cryptographic keys. After generating a backup, you should always check it for readability. It is also a good idea to use an external program to generate MD5 checksums, for this will allow you to check the integrity of the backup later on.