You can save a copy of an enclosure outside the metadata if you want to use it outside ArcGIS.
- In ArcCatalog, click the ArcGIS item in whose metadata you want to enclose a file.
-           Click the Metadata Properties button  on the Metadata toolbar. on the Metadata toolbar.The Metadata Properties dialog box opens. 
- Click the enclosure that you want to save as a separate file.
- Click Save As. 
The Save Enclosure dialog box opens. 
- Navigate to the folder in which you want to save the file.
- Type a different name, if appropriate, in the File name text box.
- Click Save.
- Click Cancel.