Formatting external storage device using disk utility

how do i format my external hard drive using disk utility? thanx

I just went to DU and looked at Help to be sure the instructions were clear.
Go to DU, then go to Help. I put in "formatting HD" in the ask a question field and quickly got the directions for how to do this. It depends on whether you are wanting to format a startup or non-startup disk and whether or not you want to partition the drive. You aren't specific in your question here - sorry for being rather vague in my reply.
Mrs H

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