Zip drive. In 100MB, 250 MB, and eventually 750 MB capacity. A cartridge about the size of a 1.44 floppy, but much thicker,
I still have some of these drives, but not discs, in my boxes of old stuff. Today when a 128GB SSD is about $25 and a short cable to connect that to a USB 3.0 port is about $7...even a USB flash drive is slow let alone what preceeded them by decades.
Long obsoleted today by the USB thumb drive and soon after USB hard drives and SSDs and even portable nVME drives, when the Zip arrived it was wonderful for those of us in the business of producing printed materials, brochures, catalogs, that sort of thing...DTP, if you will. Now it was possible to pass on a 60 MB (and later, 200 and even 600 MB) Postscript files and native file folders using a 250 or 750 Zip drive, connecting to a parallel port or one of the new new USB ports. There were also internal versions that ran as an IDE device on a hard drive connection.
The zip put the troublesome Syquest away. And one could buy a drive for a hundred dollars, and discs for $10 or so, although not at first when they were closer to $20.
And as I was running a small PostScript Service bureau, I loved these things., I don't recall ever having one crash...until the drives got old and then strange things would happen. But by then, the 250 and 750 drives weren't enough.
Not quibbling with the advantages of multiple monitors...my normal set up is and has been 3 monitors for some years now. Or Logitech's assortment of wonderous devices, I'm using a G710+ keyboard and a 510 mouse just now. (I recall when I first used one of their 3 button mouses (mice?) with Wordstar 3 or 4 on an early DOS box, I may still have that old mouse still around somewhere.
Perhaps not a peripheral, but DSL...has anyone been immune to the advantages of that? Formerly this line was used as an alarm circuit and several pioneers discovered you could send something else over this. There used to be a magazine all about this wonderful new thing that was going to happen "Real Soon Now" as the late Jerry Pournelle would say in his Byte column.
Thanks for the opportunity to remember.(GD&R)