You got to check the Windows eventlog to see what is happening to the services.
Why do you need to stop and start the BE services on a regular basis? There should be no reason to do so.
Are you using BE 2010 R2 or R3? If so, BE would be notified when the USB drive is plugged into the media server and it would be made online automatically. If you are not, then I would suggest that you upgrade to BE 2010 R3 which is the latest version. Your existing licence keys will work. You can download BE 2010 R3 from either the fileconnect site or