A secondary storage device is a hardware component of a computer, also known as an auxiliary storage device. It is a part of the computer which is connected to the computer separately. The data stored in it is permanent, that is, the stored data is not deleted when the computer is turned off.
You can open the file or folder saved in it in future and view or modify it as per your need. Secondary memory has more storage capacity than primary memory. Secondary memory includes Floppy Disk, Hard Disk, Compact Disk, Optical Disk, Memory Card, Pen Drive, SSD etc.
What does Secondary Memory do ?
The function of secondary memory is to store personal data, software data and all the data of the computer, this data can be photos, videos, movies, songs, games, documents etc. Secondary memory provides adequate storage capacity, making it possible to store data easily.
Types of Secondary Memory :
There are 7 types of secondary memory – HDD, CD Drive, DVD, Blue-Ray Disk, PenDrive, Memory Card, SSD.
HDD – It is called hard disk drive. It stores data in circular disk.
CD – It is called compact disc drive. It stores data in a thin circular disk.
DVD – It is called Digital Versatile Disc. In this also the data is stored in a thin circular disk, the speed of DVD is higher than that of CD.
Blue-Ray – It is called Blue-Ray Disc. It is also a circular disc and its storage capacity is higher than that of DVD.
PenDrive – It is very small in size but its storage capacity is high. It is also known as flash drive.
Memory Card – It is smaller in size than a pendrive and has more storage capacity.
SSD – It is called Solid State Drive. This is the most advanced technology till date, its special thing is that its speed is the highest compared to other storage devices.
Benefits of Secondary Memory :
1. Its storage capacity is high due to which it is capable of storing large amounts of data.
2. It is cheaper than primary memory.
3. This memory provides an inner layer to keep the data safe.
4. Data can be backed up in this memory.
5. Even after the computer is turned off, the data in it is not destroyed.
Disadvantages of Secondary Memory :
1. It is slower than primary memory.
2. CPU cannot access it directly.
3. It is very difficult to recover data.
4. Once broken it is difficult to fix.
Conclusion :
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