I know most of you are old enough to remember 5 1/4″ floppy disks, but did you know they used to sell them in single packages?
Most commonly, blank disks were sold in packs of 10. They came in cardboard boxes, which could be used to store them. If you bought them in bulk (like I occasionally did) you could order them in 25, 50, or even 100 packs. Back then formatting a blank disk took a minute or two, so you could save money by purchasing them unformatted, or save a little time (but spend a little more) by buying formatted ones. If you were really desperate you could buy them without the paper sleeves.
Back before Radio Shack was your home for cellphones, batteries and remote controlled toys, they sold computers and computer accessories, including blank disks. I found the disk pictured above out in my garage, and it is of a single floppy disk in plastic.
I am imagining a scenario in which someone might need to buy a single floppy disk. Perhaps a businessman on his way to work might remember, “Oh! I forgot! I was supposed to bring a single blank disk to work today!” That lucky fellow could swing his Ford Pinto right into Radio Shack, pick up a Tandy-brand floppy disk, and be on his way in no time. (I’m assuming a guy who could only afford to buy one floppy disk at a time might drive a Ford Pinto as well.)