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    SSD

                     SSD stands for  Solid State  Drive.  It is the latest
                     storage  device  that  uses  flash memory  to  store
                     data.  It is more durable and faster than a hard

                     disk  as it  has no moving  parts. It has a short
                     read-access time that speeds up the computer.

                                      CD
                          CD
                                      A Compact Disc (CD) is a shiny, circular disc that can store up to 700
                                      MB of data. It needs a CD drive to read the data. It is used to store

                                      data such as music, videos or software.

                           An optical disc uses a low-powered laser beam for writing and reading information.
                                           CDs, DVDs, Blu-ray Discs are optical storage devices.

                     DVD

                     DVD stands for Digital Versatile Disc or Digital Video Disc. It is an
                     optical storage device that looks like a CD but offers a much larger

                     storage capacity, ranging from 4.7 GB to 17 GB.

                                         BLU-RAY DISC

                                         A Blu-ray Disc is an optical disc that uses a blue-violet laser. It can

                                         store up to 25 GB on one side and 50 GB on both sides, which is
                                         about five times more than a DVD.

                     PEN DRIVE

                     A Pen Drive or USB Flash Drive is a portable storage device that

                     connects through a USB port. It uses flash memory to store data and
                     comes in different sizes like 4 GB, 8 GB, 16 GB and more.

                          A USB port is used to connect external storage devices to a computer for
                                                         data transfer.

                                                                                                  Computer Memory       11

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