I am using a memory stick. When i remove the device the application doesn’t notice the removal. If I  try to mesure drive speed then I got the following unhandled Exception.

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Windows – Kein Datenträger
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Exception Processing Message c0000013 Parameters 75b0bf7c 4 75b0bf7c 75b0bf7c
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Abbrechen   Wiederholen   Weiter  
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Then the device shows with an error.