If you have a model with requirements links that are stored with the model, you can move those links to an external file. When you move internally stored links to a file, the RMI deleted the internally stored links from the model file and saves the model. From this point on, the data exists only in the external file.
Open the model that contains internally stored requirements links.
Select Analysis > Requirements Traceability > Move to File.
The Select a file to store RMI data dialog box prompts you to save the file with the default name model_name.req.
Accept the default name, or enter a different file name if required.
Note: Use the default name for externally stored requirements. For more information about this recommendation, see Guidelines for External Storage of Requirements Links.