# hard disk

CEFR B1 · Compound

Source: https://englishreference.com/word/hard-disk
Updated: 2026-07-22

## Definition

the part inside a computer that stores all your files, photos, and programs permanently.

For teachers: a rigid magnetic disk on which digital data is stored. It serves as the primary non-volatile storage device in most personal computers.

## Examples

- My hard disk is almost full because of all these videos.
- You should back up your files to the cloud in case your computer's hard disk fails.
- While solid-state drives are faster, traditional hard disk technology remains a cost-effective solution for storing massive amounts of data that do not require instant access.

## Usage notes

- Often used interchangeably with 'hard drive' in casual conversation.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.