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Memory Storage Devices of Computer and its Different Forms

There are different memory storage devices of a computer. They differ  from one another and their function is different.

 In computers the internal memory space is always provided in the form of RAM. The RAM memory sticks which may be at the maximum of few GB space are never sufficient enough to meet all the memory requirements of the computer. More over the RAM modules are always the temporary memories that means when ever the power supply to the computer is shut down, the data available in RAMs also vanishes. There fore to store the data information permanently and to also meet the processing requirements of the CPU, external storage devices are needed. 

Storage Device

Different types of Memory Storage Devices

Different types of memory storage devices are discussed below depending upon their sizes and capacity.
Floppy Disk: 3.5″ – 1.44 MB; 5.25″ – 1.2 MB or 720 KB
Zip Disk: 250 MB
Super Disk: 200 MB
Jaz Disk: 2 GB
Compact Disk (CD): 640-800 MB
Digital Versatile Disk (DVD): 4-8 GB
Blu Ray Disk (BD): 25-50 GB
Next Gen BD: 1 TB
Hard Disk Drive (HDD): Upto 6 TB
USB Pen Drive: Upto 128 GB
Flash Drive: Upto 1 TB
Note: With advancement of technology, the size of the secondary storage devices is reducing and its capacity is increasing. The older devices are slowly becoming obsolete.

Understanding Data Godzilla

UNIT
SIZE
Kilobyte (KB)
1,024 bytes
Megabyte (MB)
1,024 KB
Gigabyte (GB)
1,024 MB
Terabyte (TB)
1,024 GB
Pentabyte (PB)
1,024 TB
Exabyte (EB)
1,024 PB
Zetabyte (ZB)
1,024 EB
Yottabyte (YB)
1,024 ZB
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