Old SW activation

I have an older model WDBCGL0020BSL that I recently dug out of a box and would like to use it. My problem is that the original activation S/W is not installed. I believe I erased everything and only used it as a sort of back up. Is there someway I can reinitialize the device and use it as designed? Your help is appreciated.

@WDBCAL42
Is this what you own?
WD My Passport for Mac WDBCGL0020BSL - hard drive - 2 TB - USB 3.0 Specs - CNET

You should go back to the WD Community and post your topic in the correct sub-forum for your device.

Thank you for your response. I will try and find that sub-forum and place my question.