Not all use-cases require a high speed:capacity ratio.
I mean, I have an 18TB USB hard drive, which sustains transfer at about 50MB/sec in practice. It is nearly full, and its level of performance has never been a show-stopping problem.
It’s hard to imagine a use case where a NAS would be a viable alternative to an SD card.
I guarantee you, T-Mobile does not hesitate to hand over any and all data they have to the government. And they don’t encrypt shit, as evidenced by their many many data breaches.
The postal service is from a different era, and has legal protections I wish online equivalents had. Logically they should. Realistically they probably never will.