You can perform several operations on referenced drawing files (xrefs).
You can insert any drawing file as an external reference or xref in the current drawing.
You can view and edit the file name and path used when locating a particular drawing reference (xref). Use this option if the referenced file has been moved to a different folder or renamed since it was first attached.
To completely remove DWG references (xrefs) from your drawing, you need to detach them rather than erase them.