The floppy disk drive was invented in 1967 by Alan Shugart, using 8-inch disks initially that later evolved into the ubiquitous 5.25-inch disks holding 360KB introduced in 1981. Floppy disks recorded data using magnetic material coated on a thin plastic disk, allowing information to be stored, erased, and rewritten easily and inexpensively. While floppy disks were popular for decades, the technology became obsolete as higher capacity storage options emerged, and floppy disk drives are no longer installed on modern computers, though some users still access the format using inexpensive USB floppy disk drives.