Save pages to disk
You can have select to have updated pages saved to disk when a change or error is detected. To enable this option, edit the site and select the Alerts tab and click the 'Save to disk' sub-tab (Pro version only):
Check the 'Save page to disk' option to save changes to disk. Optionally check the 'Override default save options' if you want to specify save options that are specific to this site only. If left unchecked, the default save options configured under Setup is used.
See 'Save to disk' defaults for an explanation of each option.