It's still less dense than 200GB MicroSD cards.

(which are only $79.50 on Amazon)

Does that density include the connectors and buses that would be required to access those cards?

Then you have to include the connectors and buses to access the SSD as well.

And it will still be in favor of microsd, which can be read by a tiny connector + tiny controller in a smartphone.

I think parent was asking if you can fit 75 microSD cards (75 * 200 GB = 15 TB) and the required connections in the form factor of this SSD.

If you're just counting the flash chips on circuit boards, I would think that you could fit many more SD innards and wire them together with some type of controller in this space. I don't doubt however that given the use-case, it has some room allocated for chips going bad, heat dissipation, etc inside. If they could have made a 20TB drive instead for the enterprise market in this form factor, they would have.

Yep, that's exactly what I was asking. Remember also that both solutions have to use the SAS connector to interface with the main board. It's a little disingenuous to say that Samsung could have glued a bunch of SD cards together because it's not really comparing apples to apples.

What's more amazing is that it's still a long way to go compared to biological storage: https://news.ycombinator.com/item?id=4396931

But biological storage also doesn't have the random access characteristics and read/write speeds of this storage.

Does it need them? My memory seems to hold a lot of things, and the ability to look them up instantly (not counting the decompression delay AKA tip-of-the-tongue syndrome where you know you know something but can't recall it until it suddenly comes to you.)

If it comes to you. Sometimes biomemory just fails. In fact, it fails a whole lot, but the layer that does the access often just makes up something plausible to cover that fact. :)

It also writes every time it reads.

Your memory is not accurate as you think it is. Your processor fills out the missing pieces so you think you remember it accurately.