How do I change the Hard Drive Icon?

[Hitochiisai]

I tried to do it. It had me replace some stuff but nothing. Still is the regular hard drive. Not sure where I went wrong. I'm also running mountain lion and 7

 

[simsaladimbamba]

I tried to do it. It had me replace some stuff but nothing. Still is the regular hard drive. Not sure where I went wrong. I'm also running mountain lion and 7

The following method works for my internal and external HDDs:

How to set an icon for an application, file or folder & restore to the original icon​