The 1TB SSD for Series X is still $219 on amazon here in the US, the Western Digital 1TB SSD with heatsink is only $169.99 on amazon, it launched much higher that less than a year ago. The 2TB model which is the one I have cost me $477.30 back in July, now on Amazon it's down to $288.00 while the 2TB card for the Series X is $399 on Amazon and the MS store. Clearly Sony's approach was the better one, it takes less than 5 minutes to install, and you are done worrying about it while the Xbox expansion card takes a couple of seconds but costs a hell of a lot more and there is no competition to drive the price down. How many companies are going to try to make drives that only work on one product?