He was a software engineer and he had literally never heard of floppy disks!
I'm 41 and I felt so old...
About the time I got to the point in school of needing to send documents (mid-00s), flash drives had come down in price that everyone had them, and by 11th grade, even we had school emails.
The majority of my use of them was that I cut my computing/networking/programming teeth on all the 90's and early 00's computer hardware that my dad had hanging around. I had piles of floppies and no flash drive so I made do with what I had available.
I have symmetric gigabit, but my buddy in Fresno sure doesn't.
(on a side note, I am one of my only friends who actually enjoys going to the computer history museum. I just wish I could interact with the old machines. I wish there was a "come learn a bit of cobol, fortran, or <<machine specific assembly>> and write a small program for our 1401" option available.)
The floppy drive itself was a regular old PC drive, 34-pin interface, just mounted in a machine on a long cable vs. inside the PC case.
Bigger, fancier duplicators have multiple drives and write in parallel, but due to the cheaper configuration of this single-drive duplicator, it was possible to use it like a tape library. Mostly this was for fun, I'm sure he had tape drives on which to save his backups!
I gave her a 5.25" floppy to take in and show as part of her presentation -- her _teacher_ asked if she could keep it since she had never seen one.