AutoCAD Guides
Xref - choosing our Path Type
Choose the right Xref path type in AutoCAD, No path, Full path or Relative path, so references are still found when you move the project folder.
AutoCAD Guides
Using Xref first step! How to attach Xref?
Attach an Xref in AutoCAD with the Insert ribbon or the XR command, using a house plan and furniture drawing example and the main attach options.
AutoCAD Guides