Reformatting WD Element to use for MacBook Pro

I just retired my Dell Latitude and was expecting to be able to use my WD Element External Hard Drive on my new Macbook Pro but am confused as to how to reformat my External HD for use on my Mac. I’m not extremely tech-savvy and would like some help in plain English as to how I would go about reformatting my Element. Any help would be greatly appreciated :smiley:

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