Blank LS-120 "Superdisk" media. From Wikipedia, the free encyclopedia: The SuperDisk, sometimes marketed as LS-120, is a high-speed, high-capacity alternative to the 90 mm (3.5 in), 1.44 MB floppy disk. The Superdisk hardware was introduced by 3Ms storage products group (later known as Imation). Imation mainly sold Matsushita-built drives under the SuperDisk name; other companies tended to use the LS-120 name.