Customize the Auto-Save Options
Click the application button
and then click Options.
In the Options Editor, expand the General node and click Auto-Save.
Adjust the Auto-Save options, as required. For example, if you want Navisworks to save a backup file every 20 minutes from a significant file change, enter 20 into the Time between saves (minutes) field.
Click OK.
See the Auto-Save Page topic for more information on these auto-save options.