Samba external hdd, can I?

I’m running hassio on a raspberry pi. It’s running off the sd and it’s fine. I found a 2tb external hdd laying around and I wanted to make it network storage. When I use the samba add on it sambas into the sd, hassio is in. Anyway to make it samba into the hdd instead?

Have a look here

Just what I was looking for, thx