People frequently get sent DXF/DWG files when working as part of a team. DWG is the native format of AutoCAD® produced by Autodesk Inc. DXF is the drawing Exchange Format also used by AutoCAD®. Many other CAD applications can export to DWG format too. Luckily the import process is the same for both! You can also choose to Reference your DWG/DXF file. This creates a link from your project file to the DWG file without you having to import all of the DWG/DXF geometry into your file. This makes it much easier to manage received drawings in a team project, once a DWG/DXF have been superseded by a new one, as long as the DWG/DXF retains the original name all files will always be up to date! It might be a good idea to import DWG/DXF files into a blank file first, as a sort of quarantine. You can edit the information you have received in there, then reference that Vectorworks file into your main project files.