How to erase drive

In my attempts to erase my locked drive I seem to have lost the WD software to erase the drive.
It was locked with a password and using that password I am able to open it.
However I have found no way to erase the data. I have tried using the Mac’s Disc Utility with no luck.
Can anyone help me? I sure could sue some and it would be most appreciated.
TIA for sure!!!

Hi Herb,

You can download the WD Security from the link mentioned below and try unlocking the drive with the password you setup through WD Security.

You can refer the link mentioned below to reformat the hard drive.