Magneto-optical disks are a type of storage media that use magnetic and optical technologies to read and write data. However, they are also known by different names, such as MO disks, magnetic-optical disks, and magneto-optical storage disks. These disks were popular in the 1990s, especially for backing up data and storing large files, but have been largely replaced by newer technologies like USB flash drives and cloud storage solutions. Despite this, magneto-optical disks remain a reliable and cost-effective option for certain applications, such as archival storage and medical imaging. Overall, regardless of their name, magneto-optical disks continue to serve a valuable role in data storage and backup.