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.