MTaimur,
You would need to order disks. You can order them from this HP site, or you can contact the HP support over the phone and order them that. If you reside in the US or Canada the number is 1-800-474-6836. If you live in a different country click on this link, select your country, click on “technical support after you buy”and the number will be provided.
Please respond back at your earliest convenience.
Thanks