@tnbp @bagder in 2008, 1TB drives were commonplace (I know this because in spring 2009 I bought an 1TB slim (with iirc only two platters) 5400 rpm drive (HD103SI), it was just $90 back then). Just as 20GB drives were kinda commonplace in 2002 (back then, even laptops with drives that size weren't uncommon). And just as ~10TB were available around 2018.

But to get 300GB now, one'd need to build a huge raid array and fork off way more money. The drives alone (without redundancy, and without the overhead for all the array-related hardware) would cost ~4k€, putting it way out of reach of ordinary consumers. But similarly you could have build a 20TB array in 2008, or 1TB in 2002.

So I don't think this is a fair comparison. Spinning platters disk space was growing fast until maybe ~2011 (when the floods in Thailand happened) and then it basically stagnated (we got like 6x density growth in the 14 years after that, and maybe 3x decrease in price per gigabyte). And SSDs are growing fast, but they still didn't overtake HDDs in terms of price; even the cheapest ones are still 3x/4x as expensive as 3.5" HDDs... which means that they approached 2011-era HDDs in terms of price and exceeded them in terms of capacity and physical size, which is great! But still very far from Moore's law, or 500x jump from floppy disks to CDs.