how to block copy data from computer to flash or usb

How to secure your computer so that data can not be copied to the flash do the following

1. Open REGEDIT
2. HKEY_LOCALMACHINE \ SYSTEM \ CurrentControlSet \ Control

3. In CONTROL folder, type -> Edit> New> Key
The new folder name -> "StorageDevicePolicies"

4. "StorageDevicePolicies", type Edit> New> Dword (32-bit)

5. The new key name: "WriteProtect"

6. Click 2x Key WriteProtect it, then change the Value Data so 1

7. Restart

To open a protection for the data can be copied to the flash by changing the value in write-protected key to 1.

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