(1) See USB drive.
(2) A disk or disk cartridge that is inserted into the drive for reading and writing and removed when not required. Using optical technologies, CDs and DVDs are the most common examples.
Before the Internet became a common transport mechanism, and before the widespread use of external hard drives that plug in via USB, many types of removable, cartridge-based magnetic disks were made for backup and transport. All such products exceeded the limited capacity of the floppy disk. In the 1980s, SyQuest pioneered the removable magnetic disk (see SyQuest). See Zip disk, REV disk, magnetic disk and optical disc.

Although numerous removable disk technologies have come and gone throughout the 1980s, 1990s and 2000s, REV drives and media were still advertised on Iomega's Web site in early 2010 (see
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