Also likely that they are already super experienced with that particular SSD. I read an article a long time ago that talked about a spacecraft with some camera on it. They said the camera was 10 years old when it was installed and although their were better cameras out there, they picked this one specifically because of reliability.
Chances are they or the manufacturer have a room full of those cameras clicking away on a schedule for the last ten years, too, as an early warning system.
Could it perhaps be this? Interesting read about the level of effort and process invested in the Space Shuttle's software (~1996) [0]
For a TLDR, this answer [1] is great.
My favorite excerpt: The Shuttle software consists of ca. 420,000 lines. The total bug count hovers around 1. At one point around 1996, they built 11 versions of the code with a total of 17 bugs.
They are big TLA+/formal specification fans (the article predates TLA+'s rise) with well resourced and antagonistic Q/A engineers.
That hard drive will have been ordered, custom, and the controller verified by hand I imagine.