Click Save on the Quick Access toolbar. If your file has been saved previously, Autodesk Navisworks overwrites the file with the new data.
If you file has not been previously saved, the Save As dialog box opens.
Enter the file name, use the Files of Type box to select one of the native Autodesk Navisworks formats (NWF or NWD), select the location for the file, and click Save.
Tip: If you need to open your file with an earlier versions of Autodesk Navisworks, save it as that version type.