TDK 50-pack 3.5" Floppy Disks Preformatted for PC Although overlooked these days, due to the emerging prominence of the CD-ROM and high-capacity storage systems, the 3.5 floppy disk remains an extremely convenient method of backing-up small files Many computers also advise first-time users of a computer system to backup the initial system for safety and this package of 50 disksmay be used for this purpose