Storage Device

CDs are optical storage devices used to store and distribute various forms of data such as software, music and movies. The 3.5 inch floppy disk stores about 1.44 MB of data. This allowed the users to only copy files of small size on the flopy disk. The CD stores more data than the floppy disk. The CD holds 700 Mb of data. The data stored on a CD can last for longer period as compared to floppy disks. The CD-ROM drives can only read data from a CD and CD-RW drives can read, as well as write data on a CD.

Digital Versatile Disk or Digital Video Disk (DVD) is a form of digital storage. DVD is used to store music, video, games and multimedia applications. DVD is similar to a CD in a appearance and structure. It offers higher capacity and better quality as compared to the CD. The storage capacity of a DVD is 4.7 GB which is approximately seven times that of a CD. To play a DVD, a DVD ROM drive is required.