A microdrive is a type of hard drive that is designed to be extremely small and lightweight. It is typically used in portable devices such as digital cameras, music players, and PDAs. Microdrives are typically smaller than a regular hard drive, but they can still store large amounts of data. They are usually made up of a small circuit board with a spinning platter and a read/write head. The platter is usually made of a special material that is able to store data in a very small space. The read/write head is used to access the data stored on the platter. Microdrives are usually powered by a battery, and they are often used in devices that need to be portable and require a large amount of storage. Microdrives are becoming increasingly popular as more and more people rely on portable devices to store and access their data.