Removable media is usually defined as some type of non-fixed storage that can be easily added and removed to an existing computer. One of the earliest examples was the simple floppy disk.

TOKYO — Eight companies, including some of the biggest names in Japan’s electronics industry, have formed a consortium to promote and license a new removable hard disk system for use in PCs ...

Compatible with both Windows and Macintosh computers via USB and FireWire interface modules, the Peerless drive system utilizes removable disks in capacities of 5, 10 and 20 GB.

My Computer Does Not Show My iPod Connected to It on the Hard Drive. You can use your iPod as a removable drive, just as you would use a thumb drive or an external storage device, with your computer.