When thumb drives first started becoming a thing, 15+ years ago, 256K on a drive was fairly common. I spent 99 bucks on one. .
In 2009, I bought a 2 gig micro-SD card (for a camera, I think) that was two gig, for about 12 bucks including a very tiny USB reader. I think the card alone was 6 bucks. The card was about the size of my little fingernail. In 2011 I bought a 32G card, for about 79 bucks - so about half as much per gig in 2 years. I just looked at Amazon and a 1 TB card is about 139 bucks. 30 times the capacity of the 2011 one, for twice the price. Or roughly 15 times as much storage per dollar as the 2011 card - over 10 years. It might be interesting to plot the price per gig over time to see if it’s accelerating or decelerating.
In 2019 I bought a 500 gig solid state hard drive (i.e. not just the memory card, but a full unit) that fits in a small pocket, for about 90 dollars. So: more $$ per unit of storage than the 1 TB micro USB card right now, but then this is a fully functional solid-state drive. Those are actually still selling for about the same price - I just checked.
My first job out of college, 40 years ago, involved an IBM mainframe. When the company began to have budget cuts, one way they saved money was to cancel a memory upgrade - 8 kilobytes. I suspect my Metro card’s built-in chip has that much memory!
Other price points: We bought our first Mac, an SE, in 1986 (I think). It had a whopping 1 meg in internal memory. - AND it took the 3.5 inch floppies that held 800K apiece. Woohoo! We later upgraded it, for a couple hundred bucks, to have 2.5 meg. AND, we bought an external hard drive: 20 meg, for 600 dollars.