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Types of CDs:

                  1.  CD-ROM (Compact Disc Read-only Memory): A CD-ROM is a type of CD that
                     contains data written during manufacturing. This data is permanent and cannot
                     be modified or erased from the CD.

                  2.  CD-R (Compact Disc Recordable): A CD-R allows users to write data to the
                     disc only once. Once data is written, it cannot be changed or erased, making it a
                     permanent storage solution for backing up files, creating music CDs, or storing
                     important documents.

                  3.  CD-RW (Compact Disc Rewritable): A CD-RW can be written to, erased, and
                     rewritten multiple times. This flexibility allows users to modify the data on the
                     disc as needed, making it suitable for tasks that require frequent updates or
                     changes, such as data backup or temporary storage.


                  Digital Versatile Disc or Digital Video Disc (DVD)
                  Like a CD, a DVD is an optical disc designed for storing large
                  files,  such  as  High  Definition  (HD)  movies.  DVDs  come  in
                  single-layer and dual-layer formats. A single-layer DVD can hold
                  up to 4.7 GB of data, while a dual-layer DVD can store up to 8.5
                  GB. The only difference is that it can hold more information
                  than a CD. DVDs are widely used for storing and viewing movies                           DVD
                  and other data.

                  Blu-ray Disc

                  A Blu-ray disc is an  optical  disc designed for storing large
                  amounts of data and playing high-definition videos. The primary
                  difference between Blu-ray discs and DVDs is their storage
                  capacity, with Blu-ray discs offering significantly more space for
                  data and higher-quality video content.                                                Blu-ray Disc
                  Flash Drive

                  Flash Drive, also known as flash storage, is a type of non-volatile memory. It is
                  used for easy and fast information storage in computers, digital cameras and home
                  video game consoles. Some of the devices based of flash memory are pen drive,
                  memory card, and solid state drive.

                  Pen Drive
                  A pen drive functions as a portable hard drive, offering ease of use
                  due to its small size and portability. It can be carried in a pocket
                  and plugged into any computer with a USB port. Flash drives,
                  also known as pen drives, can have storage capacities of up to 1
                  TB, making them a versatile solution for storing and transferring                      Pen Drive
                  large amounts of data.




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