I know they're floppies but when I see them like this it always reminds me of the first intern role I had at datacard/gemplus UK, I had to change the disk stacks in the main frame at specific times with specific access codes, lift the lid and pull out the disk stacks, put them on a specific numbered trolly and insert the next stack.

Was all very precise and I saw someone screw it once, glad it was a perm staffer and not me, I took so many notes on that process I dreamt of them for years.