Format directory from command prompt

Steps:

1. Click on start button.
2. In the search box type "CMD".
3. Right click on "CMD" option.
4. Click on "Run as Administrator" option.
5. Click on "Yes" button.
6. In the command prompt window type "Format D:" then press "Enter" key from keyboard.
7. Type "Y" then press "Enter" key from keyboard. 

    Enjoy.....