1.3.5 Memory, storage devices and media

SHOW UNDERSTANDING OF THE DIFFERENCE BETWEEN: PRIMARY, SECONDARY AND OFF-LINE STORAGE AND PROVIDE EXAMPLES OF EACH, SUCH AS:
PRIMARY: READ ONLY MEMORY (ROM), AND RANDOM ACCESS MEMORY (RAM)
SECONDARY: HARD DISK DRIVE (HDD) AND SOLID STATE DRIVE (SSD); OFF-LINE: DIGITAL VERSATILE DISC (DVD), COMPACT DISC (CD), BLU-RAY DISC, USB FLASH MEMORY AND REMOVABLE HDD 
 
DESCRIBE THE PRINCIPLES OF OPERATION OF A RANGE OF TYPES OF STORAGE DEVICE AND MEDIA INCLUDING MAGNETIC, OPTICAL AND SOLID STATE
MAGNETIC WORKS IN SUCH A WAY THAT THE DATA IS ENCODED BY POSITIVE AND NEGATIVE CHARGES, WHICH REPRESENT THE 1’S AND 0’S.

OPTICAL WORKS IN A WAY CD’S DO, EITHER RED OR BLUE LASER IS SHONE, AND IN THE CD, THERE ARE PITS AND GROOVES, WHICH REPRESENT THE 1’S AND 0’S. SOLID STATE IS A BUNCH OF NAND GATES CONNECTED, AND THEY ARE CREATED IN A SUCH A WAY THAT THEY CAN STORE THE 1’S AND 0’S.
 
DESCRIBE HOW THESE PRINCIPLES ARE APPLIED TO CURRENTLY AVAILABLE STORAGE SOLUTIONS, SUCH AS SSDS, HDDS, USB FLASH MEMORY, DVDS, CDS AND BLU-RAY DISCS
SSDS ARE SOLID STATE, THEY ARE MADE FROM NAND GATES. HDDS ARE MAGNETIC STORAGE, AND THE DATA IS READ BY THE READ-WRITE HEAD WHILE THE DISK IS SPINNING. USBS USE FLASH MEMORY. DVDS, CDS AND BLU-RAY ARE OPTICAL STORAGE DEVICES, THEY USE A LASER TO READ INFORMATION (THE 1’S AND 0’S).
 
CALCULATE THE STORAGE REQUIREMENT OF A FILE
ONE CHARACTER IS A BYTE, IMAGES ARE RESOLUTION (HEIGHT X WIDTH) X BIT DEPTH. AUDIO IS CALCULATED BY BIT RATE.