Sorry to tell you. The WD Security software uses your password to electronically lock and
unlock your drive. If you forget your password, you will not be able to access the data
that is on your drive or write new data to it. You will have to erase the drive before you can use it again. The only way in this case to “erase” the password is to format the drive on your computer, and then all data on drive is gone.
I suggest you keep all your user names and passwords in a file for each website, device, etc…