In 3ds Max, select File > Export from
the main menu bar. A file browser appears. Browse to the location
where you want to save the FBX file.
Name the file and select Autodesk (.FBX)
in the Save as Type field.
Click Save. The FBX Exporter window opens.
Select options for export from the FBX
Exporter window. For more information about the export options and
which are appropriate for you, review the
Export section.