Summary 📝

Secondary storage in computer systems refers to a type of storage used to hold data and programs that are not actively being used by the computer's central processing unit (CPU). 

Unlike the computer's primary memory (RAM), which is volatile and loses its content when the computer is turned off, secondary storage is non-volatile, meaning it retains data even when the power is off. 

Examples of secondary storage devices are hard disk drives (HDDs) and solid-state drives (SSDs). Secondary storage is essential because it allows users to store large amounts of data permanently, like documents, photos, and software, ensuring they are not lost when the computer is shut down. This extra storage space is crucial for accommodating data that cannot fit in the limited and temporary memory of the computer's RAM.

Key learning Points 📌

• Secondary storage refers to any storage that keeps data w

• Secondary storage refers to any storage that keeps data when the power is off. It is non‑volatile.

• Primary memory (RAM and ROM) is either temporary or fixed and can’t store files long‑term .

• We need secondary storage to save programmes and data not currently in use, and retain them when the computer is switched off .

• Its capacity is much larger than RAM, though it is slower and more affordable per gigabyte .

• Secondary storage is ideal for backing up, archiving, and storing large files safely.