USB storage capacity
I remember when i was at college and the idea of storing things on something you could plug into a USB was becoming a 'thing'. (mice, keyboards, printers had been around a while).
To avoid all the nonsense that my classmates had to put up with using floppies, myself and a couple of chums had invested in USB card readers, and what were at the time, almost exclusively digital camera memory cards. I had a 16mb compact flash card, and a single format card reader, was the best thing ever.
Was a bit of a pain needing to carry around the mini-CD with the drivers on it.