This has happened before with WD drives on my Mac, but what happened next was odd. When I tried to delete the drive, it unmounted and gave me an error message. So I proceeded with the disk utility process. I can’t remember if it’s normal to only have read only permissions for a new drive. I was logged in with my Administrator account. When I attached this new drive, it showed up in the finder right away, but when I right-clicked and selected “get info” it showed that I had “read only” permission and didn’t show the padlock for making changes. I have a MacBook Pro, and I already have four working My Passport 2 TB drives that I use regularly with it as well as a 4 TB MyBook.
I just purchased a 4 TB My Passport Ultra from Amazon.