How to Hide HardDiskDrive and External drives on my computer?

1.Go to Run
2.Type regedit
3.Open the HKEY_CURRENT_USER Folder
4.Open the Software Folder
5.Open the Microsoft Folder
6.Open the Windows Folder
7.Open the CurrentVersion Folder
8.Open the Policies Folder
9. And Click Explorer and in right side Create a DWORD with the name of NoDrives and Modify the value as 3FFFFFF
And Restart the System