IB Computer Science Topic A1.1.7: Internal and External Types of Secondary Memory Storage Key Definitions

Embedded Multimedia Cards (eMMCs) are a type of flash storage integrated directly onto a device's motherboard.

Flash drives, also known as USB drives, are portable storage devices that use NAND flash memory.

Hard Disk Drives (HDDs) are traditional storage devices that use magnetic platters and a read/write head to store and retrieve data.

Memory cards are small, removable storage devices used in cameras, smartphones, and tablets.

Network Attached Storage (NAS) devices provide centralized storage accessible over a network.

Optical drives read and write data to optical discs such as CDs, DVDs, and Blu-ray discs.

Secondary storage is non-volatile memory used to store data permanently, even when the computer is turned off.
It holds files, applications, and the operating system for long-term use.

Solid State Drives (SSDs) are a type of non-volatile storage that use flash memory to store data. Unlike HDDs, SSDs have no moving parts, which makes them faster, more durable, and more energy-efficient.