MD Data is a type of magneto-optical medium derived from MiniDisc.
In developing and marketing it, Sony was trying to set the new standard for removable media to replace the 3½-inch diskette it had also helped create. MD Data competed in a format war with other disks such as SyQuest's EZ 135, Imation's SuperDisk, and the Iomega Zip. Ultimately neither MD Data nor any of its competitors succeeded in becoming the de facto new universal standard fully replacing the 3.5 inch diskette; with recordable CD coming closest to filling the role, followed by USB flash drives.
With 140 MB disks, MD Data offered about 100 times as much storage capacity as ordinary diskettes, and more than its competitors like the Zip (100 MB), SuperDisk (120 MB), and EZ 135 (135 MB), in a physically smaller medium.
The format was featured in products such as still cameras, a PDA, document scanners, and image storage and editing systems.
Another use was in 4- and 8-track multitrack recording decks. Meant as a step up from the popular 4-track cassette-based studios, these recorders enjoyed a brief prominence before they were replaced by relatively affordable and far more flexible direct-to-hard drive recording on Windows and Apple Macintosh based computers. Some examples of products that used the format are a few multitrack "portastudio"-style audio recorders such as Sony's MDM-X4 and Tascam's 564.
Sony's MDH-10 MD Data disk drive, meant for use with Windows and Mac PCs, could also play back audio MiniDiscs. However, the drive was expensive compared to the Zip drive and others.
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