Saving and restoring wifi router configurations depends entirely on the manufacturer and model of router. Some have it. Some don't. Saving and restoring configurations for smartthings is not an option at this time. However, that's usually only an issue if you actually need to change to a new ST hub. Since most of the ST configuration is in the cloud, doing a reset on the physical hub doesn't erase the configuration. You just need to get the hub reconnected and the settings and configuration should be restored from the cloud.