What is a floppy disk drive (FDD)?

A floppy disk drive (FDD) is an older secondary storage device sometimes found inside a computer. A floppy disk drive can hold 3.5 inch disks containing up to 1.44 MB of data. Floppy disk drives are not as common as they used to be because technology has allowed for storage media that hold much more data, such as CD's, DVD's and USB devices.