I had some Seagate magneto-optical behemoth that connected via the parallel printer port. Consequently, it offered the same sort of spritely data read/write performance as chiselling hieroglyphs into a stone tablet. I remember buying it from some maze-like electronics shop in NYC that I can't remember the name of (somewhere off Broadway, south of Houston, down towards the Manhattan Bridge) though I can't remember why. It was surely important. Probably porn, it's always porn, though I'm sure it couldn't have been more than low res gifs in those days. Whatever memory I have, it's evidently less than my computer.
I think it offered up to 250MB on swappable disks, which were conceptually awesome (until Zip drives came along, about one day and a one quarter of the price later). Or would have been, I think they manufactured about six of these disk cartridges, and each cost more than the drive itself and could only be obtained by presenting yourself in Tokyo and fighting with swords for the honour of taking one home. Hey, don't knock it, 500 MB is a lot of gifs.