The Iomega Zip 250 MB USB Lot External Disk Drive is a reliable and portable storage solution for both PC and Mac users. With a compact 3.5-inch form factor and blue color, this USB-powered Zip Drive allows for easy connectivity and data transfer. The included 20 discs with storage capacities of 100/250MB provide additional storage options for your files and documents. The unit quantity of 1 ensures that you have everything you need to get started on your storage needs. Tested and works.