Not able to get my Mac to recognize my WD passport

WD External Drives External Drives for Mac
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I know how to parttion and format the drive.  When I was setting up patitions so I could make a bootable bacl up drive fr my Macbook, I erased the partitons by misstake. drive. I hit  continue button before I could undo the actiion.  after that my Macbook would not and still hasnt recognized the drive.  I have try all types of trouble shooting suggestions but still cant get the drive to be reognie, therefore it does even shpw up in Disk Utility. was wondering if someone who hase experience the same type of problem and how they fixed it.