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#1
'Safely Remove' - Blocked by unknown program
I have three external USB-3 HDDs connected via a powered USB-3 hub. Sometimes, not always, I am blocked from unplugging the hub from the PC because a program is using at least one of the HDDs. How can I determine what is preventing the 'Safe Removal' and forcing me to shutdown the PC? I do terminate all programs I have started and I have tried using Process Explorer but it shows nothing beyond PID 4 System.