Disk-shaped four-piece USB memory "RUF-Q16 / 4P"

The capacity per one is only 16 MB. Why is it in the spindle. As it is said to be a substitute for a floppy disk, it seems to be inexpensive as it is ....
USB flash memory that can be used as a floppy disk and convenient as a distribution medium | Product news
http://buffalo.jp/products/new/2005/000222.html

It is like this when it is in the spindle


The USB premise is here


The size is about this


All four colors


It would be good to use this as a common "honor" at a festival's night shop.