Storage Devices
Storage devices are hardware components used to store data and programs for short-term or long-term use.
Volatile memory, used to store data temporarily while the computer is running.
| Type | Description |
|---|---|
| RAM (Random Access Memory) | Temporary storage for data and programs currently in use; lost when power is off. |
| ROM (Read-Only Memory) | Permanent memory storing critical instructions like BIOS; cannot be modified easily. |
| Cache Memory | High-speed memory for frequently accessed data, improves CPU performance. |
Stores data permanently and retains it even when the computer is turned off.
| Device | Description |
|---|---|
| Hard Disk Drive (HDD) | Magnetic storage, large capacity, slower than SSD. |
| Solid State Drive (SSD) | Faster, more durable, uses flash memory. |
| Optical Discs | CDs, DVDs, Blu-ray; store data using laser technology. |
| USB Flash Drive | Portable, uses flash memory for quick data transfer. |
Used for backup and archival purposes.
Examples: Magnetic tapes, External hard drives, Cloud storage.
Primary storage is fast but temporary; secondary storage is permanent and slower.
Cache memory helps speed up processing by storing frequently used data.
External and offline storage are used for backup and portability.
Selection depends on speed, capacity, durability, and cost.
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