Original: The SuperDisk, sometimes marketed by as LS-120 and a later variant LS-240, is a high-speed, high-capacity alternative to the 90 mm (3.5 in), 1.44 MB floppy disk.
Simplified: LS-120 or SuperDisk is a high-speed, high-capacity alternative to the 90 mm (3.5 in), 1.44 MB floppy disk.