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Optical Disc

                  An optical disc is an electronic data storage medium that can be used to
                  write and read using a low-powered laser beam.
                  Compact Disc (CD)

                  Compact Disc (CD) is an external storage device. It can hold upto
                  700 MB of data. The CD drive reads information stored on a compact

                  disc. CD drive is usually connected inside the CPU box but can also be
                  connected using a USB port.                                                              CD
                  Digital Versatile Disc or Digital Video Disc (DVD)

                  The DVD is almost similar to a CD, even the working is also similar. The only
                  difference is that it can hold more information than a CD. DVDs are widely
                  used for storing and viewing movies and other data.


                            Blu-ray Disc                                                                    DVD

                                          Blu-ray disc  is  an optical  disc.  It is  used  for storing  a large amount  of
                                          data. The main difference between DVDs and Blu-ray discs is that storage
                                          capacity of blu-ray disc is higher than that of the DVD.


                     Blu-ray Disc

                  Flash Drive

                  The Flash Drive is a small portable data storage device integrated with a USB (Universal Serial
                  Bus) connector.

                  Pen Drive

                  It acts as a portable hard drive and is easy to use as it is small and can be
                  carried in a pocket and plugged into any computer with a USB drive. Pen drive
                  has storage capacity of upto 1TB.
                                                                                                          Pen drive

                  Memory Card
                  It is commonly known as multimedia  memory card. It is very small
                  in size  usually  1—1.5 inches. These are used  in mobile  phones  and digital

                  cameras.  You need  to  have a card reader to  read  the stored  data  on a
                  memory card.
                                                                                                      Memory card


                   Let’s PraCtiCe                                                                   Experiential Learning

                    Visit your computer lab and find out what storage devices are available and also check how
                    much storage it displays. Do this under your teacher's guidance.




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