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Pen Drive

                 A pen drive is a small, portable data storage device that uses flash memory and
                 is  integrated  with a USB  (Universal Serial Bus) connector.  It acts as a portable
                 storage  device and  is easy to use, as it is small  enough  to be
                 carried in a pocket or on a keychain. It can be plugged into any

                 computer or device with a USB port. Flash drives come in various
                 storage capacities, ranging from a few megabytes (MB) to several
                                                                                                       Pen drive
                 terabytes (TB), with common capacities up to 1 TB or more.

                 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
                 data stored on the memory card.                                                     Memory card

                 Solid State Drive (SSD)

                 An SSD is a type of storage device that holds information, like your pictures, games,
                 and documents. An SSD uses the technique of flash memory to store data. It is much
                 faster than a hard disk. SSDs are more durable and reliable than hard disks. They
                 come in various capacities, typically 128 GB to several

                 TBs. Nowadays, desktop computers and laptops come
                 with SSD instead of traditional hard disk.
                                                                                                   SSD

                     MEASURING THE COMPUTER’S MEMORY

                 The basic unit for measuring the memory of a computer is byte. A byte consists of
                 a group of eight bits, for example, 10001011, i.e., 1 byte equals 8 bits. A group of 4

                 bits is known as a nibble (half a byte), for example, 1001 i.e., 1 nibble equals 4 bits.
                 Other units  for measuring the computer’s memory are  kilobyte,  megabyte,
                 gigabyte, terabyte, and so on.

                    1 Kilobyte (KB) equals 1024 bytes.

                    1 Megabyte (MB) equals 1024 KB.
                    1 Gigabyte (GB) equals 1024 MB.

                    1 Terabyte (TB) equals 1024 GB.
                    1 Petabyte (PB) equals 1024 TB.

                    1 Exabyte (EB) equals 1024 PB.
                    1 Zettabyte (ZB) equals 1024 EB.
                    1 Yottabyte (YB) equals 1024 ZB.



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