How to change the Software Update Server Storage Location

1. Launch Terminal.app

2. Stop the software update service first. 

serveradmin stop swupdate

3. View the current storage location:

serveradmin settings swupdate:updatesDocRoot

4. Set a new location. You MUST use the quotation marks in the path.

serveradmin settings swupdate:updatesDocRoot = "/Path/to/swupdate/store/"

5. Check to make sure the path was updated successfully.

serveradmin settings swupdate:updatesDocRoot

6. Start the software update service.

serveradmin start swupdate