The document outlines the purpose and types of storage devices, distinguishing between primary and secondary storage. Primary storage includes RAM, ROM, and cache, while secondary storage comprises hard disks and USB drives, which enable permanent data storage. It clarifies that storage devices are neither input nor output devices, but are vital for storing and retrieving data.

1. By:-
Shubham

2.  A Storage Device is any computing hardware that is used for
storing, porting and extracting data files and objects.
Examples:-
1. Hard Disk 2. Floppy Disk 3. Pen drive 4. CD – ROM etc...
 They store virtually all the Data and Applications on a
computer, except hardware firmware.
There are two different types of storage devices:
 Primary Storage
 Secondary Storage

3. 1) What Is The Purpose Of Storage Device?
The purpose of Storage Device of a computer is to store the
data entered before processing and also store the results after
processing.
2) What Is Memory?
Memory is a Data stored in the form of Chips.
3) Are storage devices input and output devices?
No. Although these devices do send and receive
information, they are not considered an input device
or output device. It is more proper to refer to any device
capable of storing and reading information from a storage
device, disk, disc, or a drive.

4.  Primary Storage Device is also known as Internal Memory &
Main Memory
 Primary Storage Device is a medium that holds memory for
short periods of time while a computer is running.
Examples Of Primary Storage Device:-
1. RAM 2. ROM 3. Cache

5. RAM
Random-access memory is a form of computer
data storage which stores frequently used
program instructions to increase the general
speed of a system.
ROM
Read-only memory is a type of non-volatile
memory used in computers and other
electronic devices
Cache
Cache is a hardware or software component
that stores data so future requests for that data
can be served faster the data stored in a cache
might be the result of an earlier computation,
or the duplicate of data stored elsewhere.

6. 1) Functions Of RAM
 • The data in RAM can be read or written.
• RAM is volatile.
• RAM stores data during and after processing.
2) Functions Of ROM
• ROM is another type of memory permanently stored inside the
computer.
• ROM is non-volatile
• Programs in ROM have been pre-recorded by the manufacturer. Once it
is done, it cannot be changed.
• All the contents in ROM can be accessed and read but cannot be
changed.

7.  Secondary Storage Device is also known as External
Memory or Auxiliary Storage and are not directly
accessible by CPU.
 Secondary Storage Device is a storage device beyond the
primary storage that enables permanent data storage.
Examples Of Secondary Storage Device:-
1. Hard Disk 2. Floppy Disk 3. Compact Disk 4. USB

8. Hard Disk
A Hard Disk is a data storage device that uses magnetic storage to store and
retrieve digital information using one or more rigid rapidly rotating disks
coated with magnetic material.
Floppy Disk
A floppy disk is a type of disk storage composed of a disk of thin and flexible
magnetic storage medium, sealed in a rectangular plastic enclosure lined with
fabric that removes dust particles.
USB
A USB flash drive is a data storage device that includes flash memory with
an integrated USB interface. USB flash drives are typically removable and
rewritable, and physically much smaller than an optical disc.

9. 1) What is Optical Medium
 Optical medium is a non-volatile storage that holds content in digital form
that are written and read by a laser. These media include various types of
CDs and DVDs.
2) What is Flash Memory
 Flash Memory is a solid-state, non-volatile, rewritable memory that functions
like RAM and a hard disk drive combined.
3) Functions of Disk Drives
 Disk drives operate similarly to hard drives but use a much less dense
material to store data. Initially, disk drives are the cheapest way to store
data. A 3.5-inch disk can hold, at most, 1.44Mb of data.

11. 1) Are storage devices input and output devices?
No. Although these devices do send and receive information, they are not
considered an input device or output device. It is more proper to refer to any
device capable of storing and reading information from a storage
device, disk, disc, or a drive.
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