From the Files section in the External Drawings tab or Favorites tab, select the drawing file that contains the folder you want to attach as an external reference (xref) component.
From the Mechanical Structure panel in the Details section, drag the folder, to anywhere on the drawing area. In the drawing area, a floating preview of the component view geometry is displayed.
Move the pointer to the position you want to insert the geometry and click.
Press Enter to accept the default rotation angle or specify a rotation angle and press Enter.
The folder is displayed in the mechanical browser.