Memory and storage device

 What is Memory

Memory is the part of a computer that stores data, instructions, and information for processing.

There are two main types of memory:

1. RAM (Random Access Memory)

RAM is temporary (volatile) memory.

It stores data and programs that are currently being used by the computer.

When the computer is turned off, all data in RAM is lost.

Examples: Opening a document, browsing the internet, or running an application.

2. ROM (Read Only Memory)

ROM is permanent (non-volatile) memory.

It stores important instructions needed to start the computer (booting).

The data in ROM is not lost when the computer is turned off.

Example:BIOS/UEFI Chip – It stores the startup instructions of a computer.

Difference Between RAM and ROM

RAM

Full Form: Random Access Memory

Temporary memory

Data is lost when power is off

Faster

Used while programs are running

ROM

Full Form: Read Only Memory

Permanent memory

Data is not lost when power is off

Slower than RAM

Stores startup (boot) instructions

Storage Devices

A storage device is a hardware device used to store data, files, programs, and information permanently or for a long time.

Types of Storage Devices

Hard Disk Drive (HDD) – Stores large amounts of data permanently.

Solid State Drive (SSD) – Faster than an HDD and stores data permanently.

USB Flash Drive (Pen Drive) – Portable device used to store and transfer files.

Memory Card (SD Card/MicroSD Card) – Used in mobile phones, cameras, and other devices.

CD (Compact Disc) – Optical storage device used for storing music, videos, and data.

DVD (Digital Versatile Disc) – Stores more data than a CD.

Blu-ray Disc – Optical disc with much higher storage capacity than a DVD.

Magnetic Tape – Used mainly for backup and archiving large amounts of data.

External Hard Drive – Portable hard disk used for backups and extra storage.

Cloud Storage – Stores data on the internet.

Examples of Cloud Storage:

• Google Drive
• Microsoft OneDrive
• Dropbox