Recommendations for TechTool Protection

The Protection feature saves a copy of the disk directory for each protected volume to whatever volumes you choose.  It is suggested that you set it up to save the Protection data file for each volume to itself and to one other volume, preferably on another drive. The Protection data file may itself be inaccessible if the volume it is supposed to be protecting suffers serious directory damage. If you have a sufficiently up-to-date Protection file for a volume, you have a good chance of being able to recover files, even if they are fragmented and the original disk directory is badly damaged.