PassengerI had a friend who had some zipdisks, and a zip drive to read them.
He used to come around to people's houses and temporarily install the zip drive on their computer, so that he could then help people to install their choice of w4r3z from the zipdisks. A plug and play hard disk would have been better, but the hard disks we had then didn't like to be jostled around in a backpack.
We basically independently invented the concept of a sneakernet, except it was my friend Ed and his zip drive.