Hard drives are also known as ‘fixed disks’ because the data is stored into the memory of a computer and not intended to be removed. It compromises of one or more metal platters that is stacked together on a single spindle. Multiple read or write heads float next to the surface of the drive.
Floppy disks are designed to allow users to store data to a disk, remove it, and can be portable elsewhere.
CD ROMs also called as Compact Disk Read Only Memory are shiny disk in the shape of circular made of plastic with a hole in the middle. Data are stored on them. They are read using a powerful light-emitting diode that is sometimes called a ‘laser’ and thus it is known as ‘laser disk’. It can store data about 640 MB of data.
Digital Video Disks are first used to store movies and is also used for playback on compact players. It is still in use to store the data for movies and games.
Blu-Ray is the latest development in data storage and movie disks. It is called Blu-Ray because it uses a blue LED to read or write from the disk.
These are drives that can be removed or ported elsewhere. The media is not pulled out instead removed.