Devices Preferences
Use Devices Preferences to specify where to connect new external devices and permanently assign devices to Mac or a virtual machine.
To open these preferences, choose Parallels Desktop > Preferences , then click Devices .
        
       
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            Option  | 
          
            Description  | 
         
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            When a new external device is detected  | 
          
            Choose what to do when a new external device is connected to your Mac: 
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            Permanent assignments  | 
          
            If you want a particular external device to be always available to either Mac or a virtual machine, do the following: 
 
 To remove an existing assignment, so that the device no longer automatically connects to the Mac or virtual machine, select the device in the Devices column and click the Remove (-) button.  |