In Windows 7, we can deny permissions on any Removable Storage class. Let me show you how to enable the "All Removable Storage classes: Deny all Permissions" policy in Group Policy, as described in the following steps:
Steps/Methods
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Type the "gpedit.msc" command in the Start search box and search for results click "Gpedit.msc" under programs to bring up the Local Group Policy Editor window
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In the console tree (left window), expand the following items in turn
User Configuration--Administrative Templates--windows components--Removable Storage access
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In the removable storage Access interface on the right, locate and double-click the "All Removable Storage classes: Deny all Permissions" item
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Enter the Setup interface, which by default is "Not Configured", we select "Enabled"
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Click the OK button to save the settings and exit the Local Group Policy Editor window
Win 7 How to deny all permissions for all Removable storage devices