Click File > Export Sessions.
Click either All Sessions or Selected Sessions.
Select the export format from the drop-down menu.
Click Next to select the export file location.
If exporting to HTML5 AppCache Manifest: Check any resources you wish to exclude from the CACHE section of the Manifest. These will be added to the NETWORK section of the Manifest.
To specify a Base URL and convert the URLs to be relative to this URL, type this URL in the Base URL: field.
Click Save. The AppCache Manifest appears in a text editor.
To import traffic from HTTP Archive JSON, HTTP Archive XML (exported from [IE9 Developer Tools Network Tab]), or Test Studio Load Test:
Click File > Import Sessions....
Select the import format from the drop-down menu.
Create Custom Importers and Exporters with Fiddler Extensions.