To import one or more flows from an external ".sflow" file:
The Import flow dialog box appears which lets you browse to the external file that contains the flow. Select the file and click OK button to import the flow. You can import multiple flows at the same time by selecting multiple flow files in the Import flow dialog box.
Alternatively you can locate the external ".sflow" file using the Windows Explorer (on Microsoft Windows) or Finder (on Mac) and:
Double-click the file; this will launch Switch if it is not yet running and import the flow.
Drag and drop the file on to the Flows pane in Switch; this will import the flow.