Unable to format my new 1TB WD Elements on Mac?

I’ve followed the online help but still unable to format my external hard drive to ExFat.

I keep getting an error message which reads:

In Disk Utility it looks like this:

Please Help!!

Hi elp,

You can have a look at this KBA if you are running Mac High Sierra:
https://support.wdc.com/knowledgebase/answer.aspx?ID=20502&s=

Or else you can try this KBA: