This listing is for a set of four factory-sealed 10 packs of Sony 2HD floppy diskettes that are IBM formatted and measure 3.5 inches. These blank media disks are perfect for storing and transporting files on computers and other devices. The brand of these disks is Sony, and the specific model is MD2-HD. They are classified as mini disks and fall under the Floppy, Zip & Jaz Disks, Blank Media & Accessories, and Drives, Storage & Blank Media categories. These disks are ideal for those who require reliable and high-quality storage media.