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2.5 STORAGE, CHARACTERISTICS OF STORAGE: -:non-volatile …

- - - - FLASH MEMORY STORAGES
        
        -flash memory storage is a storage media that uses solid-state chip maintains stored data without any external power source.
        -commonly used in portable electronics and removable storage devices.
        -more durable and shock resistant than other types of secondary storages because but contains no moving part.
        
        USB Flash Drive
        
        Memory Cards
      - HARD DISK
        
        storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, information
        
        2 TYPES OD HARD DISK
        
        EXTERNALS
        
        INTERNALS
      - OPTICAL DISK
        
        Consists a flat, round, portable disc made of metal, plastic and lacquer that is written and read by laser. It store data in deformities on the surface of circular disc and reads this data by illuminating the surface with laser diode and observing the reflection. Primarily used to store software, data, digital photos, movies and music.
        
        COMPACT DISC(CD)
        -CD-ROM
        -CD-R
        -CD-RW
        
        DIGITAL VIDEO DISC(DVD)
        -DVD-ROM
        -DVD-R
        -DVD-RW
      - SOLID STATE DRIVES
        
        a storage device that use flash memory to store data, instruction and information
        
        no moving parts
        
        storage capacities up to 8 TB
        
        faster access time and transfer rates, generate less heat& consume less power