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Disable USB Mass Storage IT policy rule


This rule specifies whether a BlackBerry® device permits USB mass storage and the media transport protocol.

Default values

The default value in the Advanced security IT policy and the Advanced security (disallow application downloads) IT policy is True.

The default value in all other preconfigured IT policies is False.


The media transport protocol permits a user to transfer media files from a computer or BlackBerry® Desktop Manager to a device or media card. If you change this rule to True, a device cannot access a media card that is connected to the USB port on the device. When you transfer files using the media transport protocol, the device does not protect the files using content protection and does not encrypt the data on the media card, even if you configure the External File System Encryption Level IT policy rule.

If you change this rule to No, a user cannot transfer media files from a Macintosh computer to a device. If you change this rule to No, a user can view the contents of a media card from the file explorer on a device and from applications on the device.

This feature is not available for BlackBerry Desktop Manager 4.2.2 because the Roxio® Media Manager uses the media transport protocol to transfer files.

For more information about protecting data that a device stores on a media card, see the BlackBerry Enterprise Solution Security Technical Overview.

Minimum requirements

  • Java® based BlackBerry device
  • BlackBerry® Device Software version 4.2
  • BlackBerry® Enterprise Server version 4.0 SP6

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