Format HDD in caddy

[#1]

I am running Mint 17.2 on a bootable usb stick..... no hdd is in the machine... but I have a hdd in a usb caddy that I want to format so I can re-install O.S. on a "clean" hdd....
How do I do this with Mint 17.2 please....

[#2]

Boot the stick, open gparted with the hdd plugged in.
Select the HDD from the drop down menu,
Choose NEW partition table, then write (Return symbol)
Job done

[#3]

OK thanks HB

[#4]

Don't forget to format it with a filesystem of your choice.

[#5]

Yep !....  thanks for that !.... job done.... and all ok now.... 

[#6]

If he is reusing to install an os on then the formatting is redundant as it will be overwritten.

[#7]

Yes, I did re-install an O.S. on it.....  I just wanted a "clean" hdd to start off with... so foramatting seemed the way to go...