I agree that cloud storage is a rental scheme and not comparable, but an old sata disk here is 240Gb for £24 which is equivalent to 10c per Gig. If you go back to abandoned formats like ide hard disks you may be able to get 0.01 per Gb.

https://www.scan.co.uk/products/240gb-wd-green-sata-m2-ssd-m2-2280-sata-iii-6gb-s-slc-nand-read-545mb-s-wd-ssd-dashboard