Unable to open drive

I am new to having a MacBook Pro and external hard drives. I get a “WD Unlocker” icon when I plug the MyBook external hard drive but when I click on it, it states that my drive is not locked. I cannot access anything that I have put on the drive. I know it’s me just having a lack of knowledge, but can someone help me out? Thanks!

Maybe the drive is not mounting or it has mounted and you are not clicking on the right icon.

Look for a My Book icon on your desktop.

If you used Time Machine when the drive was connected, the drive will be renamed to Time Machine Backup.