I have a server at home built from old parts and some refurbished drives with nearly that much storage. 2800 satellites like this would come out to around 230 of my servers, or ~7PB.

A single 2U server with 12 drives, each with 24TB storage, can hold 288TB. It would take ~24 of those to get to 7PB, which is a lot of servers, but not so many that someone with quite a lot of savings couldn’t afford it.

Also, the servers on the ground can be cooled by, idk, air if needed. Or water. Or I guess liquid nitrogen if you want. Point is there’s an atmosphere for the heat to dissipate to, unlike space.