Its far from cheap.
DJI uses the same scamming tricks other brands did when they had no competition.
Anyone whos into videography remembers the RED camera debacle: they have expensive SSD cartridges sold for their cameras, but someone eventually cracked one and behold its a standard cheapo SATA SSD, repackaged into their "magic" cartridge, he even made then in china and started to sell for huge discount [I think he got sued]
DJI went even farther then that, they sell a 960gb a 70$ market value M.2 SATA drive, inside custom shell "CINESSD" for 1599$. I bet they pay maybe 40$ to 50$ per actual SSD in bulk.
There is nothing we can do right now, but we are getting scammed and Drone Photographers are going to eat it up because no alternative.
Its not a "fair" price when the best and fastest 2TB PCIe Gen4 SSD Samsung 980 Pro goes for 350USD, and DJI will be using a M.2 SATA type SSD inside for sure and thats 200$ plus minus per 2TB.
SATA is more then enough for Pro Res 4K, the Ninja V recorder uses standard of the shelf 2.5 inch SSD drives and it supports PRO RES 4K/60 + HDR, BTW, they also sell their "magic" ssds for double to tripple price, but for like 50$ they sell a set of 5 empty cartriges to put your own SSD inside. Thats pro-consumer.
If they sell
960GB for 1599USD, the 2TB will be 2500USD to 3000USD and they doing it because they can, because they have no competition.
If people ask them, i bet their answer will be that their magic drives are optimized for "heat" and "crash resistance", which translates as: 'we made metal cartridges that act like a heatsink'.