Computer Storeage Devices

Computer storage devices are hardware used to store digital data. They can be categorized into two main types: primary storage and secondary storage.

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1. Primary Storage (Volatile Memory)

Used for temporary data storage while the computer is running.

• RAM (Random Access Memory): Temporarily stores data and programs being used.
• Cache Memory: A small, faster type of volatile memory that provides high-speed data access to the CPU.
• ROM (Read-Only Memory): Stores permanent instructions for booting up the computer.

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2. Secondary Storage (Non-Volatile Memory)

Used for long-term data storage, even when the computer is turned off.

a. Internal Storage Devices

• HDD (Hard Disk Drive): Uses spinning disks and magnetic storage. Common, large capacity, but slower than SSDs.
• SSD (Solid State Drive): Faster, more durable, and more expensive than HDDs. Uses flash memory.

b. External Storage Devices

• External Hard Drives and SSDs: Portable storage connected via USB or other interfaces.
• USB Flash Drives: Small, portable, and uses flash memory.
• Memory Cards (SD cards): Used in cameras, phones, and some laptops.
• Optical Discs (CD/DVD/Blu-ray): Used for media storage, now less common.

c. Cloud Storage

• Online services like Google Drive, Dropbox, and iCloud allow users to store and access data over the internet.