Sony MPF920-Z is an easy-to-install internal 3.5-inch FDD.PRODUCT FEATURES:Compatible with 720 KB and 1.44 MB 3.5-inch floppy disks;Ideal for replacing older floppy drive, or adding a second drive;Standard 34-pin floppy drive interface for easy installation;Legendary quality from Sony - the inventor of the 3.5-inch floppy;High quality construction for years of reliable service.