Definition

Noun: A type of computer data storage that is not directly accessible by the central processing unit (CPU) and is used for long-term or permanent retention of data and programs. It is non-volatile, meaning it retains data even when the computer is powered off, and is typically slower but has a much larger capacity than primary storage (main memory).

Usage

"Secondary storage" refers to the hardware components used to store data permanently. It is distinct from the computer's main working memory (RAM). This term is used when discussing computer architecture, data management, and storage hierarchy.

Examples

• The computer's hard disk drive and solid-state drive are common forms of secondary storage.
• When you save a document, it is written from the computer's primary memory to secondary storage.
• Backing up important files to an external hard drive is a way of using secondary storage for data safety.

Advanced Usage

• Hierarchical Storage: In enterprise systems, "secondary storage" is part of a larger storage hierarchy that may include tertiary storage (like tape libraries) for archiving.
• Cloud Context: In modern cloud computing, remote data centers provide scalable secondary storage services, blurring the traditional physical distinction for the end-user.

Variants and Related Words

• Auxiliary Storage (noun): A direct synonym for secondary storage.
• External Storage (noun): A type of secondary storage that is outside the main computer chassis, such as a USB flash drive or an external hard drive. Not all secondary storage is external (e.g., an internal HDD is secondary but not external).
• Non-Volatile Storage (noun): A broader category that includes secondary storage, defined by its ability to retain data without power.

Synonyms

• Auxiliary storage
• Backing storage
• Permanent storage

Antonyms

• Primary storage
• Main memory
• RAM (Random Access Memory)

Noun

1. a data storage device that is not the main memory of a computer