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Compact Disc (CD)

                  The CD drive reads information stored on a compact disc (CD). CD is an external storage
                  device. It can hold up to 700 MB of data. Earlier, CD drive was connected inside the CPU
                  box but now it is not. Now, we can connect it using a USB port.


                                       Digital Versatile or Video Disc (DVD)


                                       Earlier,  DVDs  were  widely  used  in  computers.  At  that  time,  they  had
                                       became a popular medium for storing information and video. 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.




                  Blu-ray Disc
                  A blu-ray disc is an optical disc. It is used for storing large amounts of

                  data, and playing videos. The main difference between DVDs and Blu-ray
                  discs is storage capacity.


                  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. A
                                   pen drive has a storage capacity of up to 1 TB.








                                              The pen drive was invented in 1998 by IBM.




                  Memory Card

                  It is commonly known as a 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 the
                  memory card.






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