Documenting Sony Memory Stick
I hated how proprietary it was but I always though the physical form factor of Memory Stick was perfect. It was long enough to actually write something legible on a label, which also made it harder drop and lose.Micro SD is almost ludicrously small and completely un-label-able.Sony was always pretty good at the ergonomics of physical formats, actually. MiniDisc is such a wonderful format to use.