Layer 1: Theoretical Foundation

๐Ÿ“ 3.3 Data storage ๐ŸŽ“ Platform: IGCSE Computer Science

This topic separates primary storage from secondary storage, comparing RAM with ROM and explaining what each one holds. Secondary storage is covered by type: magnetic hard disk drives, optical discs, and solid state drives, including how each stores data and their relative speed, capacity and durability. The topic also covers virtual memory and why it is needed when RAM runs out, along with cloud storage and the advantages and drawbacks of storing data off-site.

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