# legacy backup

CEFR C1 · Noun

Source: https://englishreference.com/word/legacy-backup
Updated: 2026-08-05

## Definition

an old system or way of saving computer data that a company still uses even though newer technology exists. It is often kept to make sure old files can still be opened if needed.

For teachers: A data protection system or method based on outdated hardware or software that remains in use within an organization. Such systems are typically maintained for historical data retrieval or compliance rather than current operational efficiency.

## Examples

- The IT team still maintains a legacy backup for those old customer records.
- Transitioning to the cloud was difficult because we had to ensure the legacy backup tapes were still readable.
- The organization's reliance on legacy backup protocols created a significant bottleneck, as the modern recovery environment lacked native support for the antiquated file formats stored on the physical tapes.

## Usage notes

- Often used as a compound noun in technical contexts; 'backup' acts as the head noun modified by 'legacy'.
- Teaching tip: use this to teach the technical sense of 'legacy' as 'outdated but still in use', which differs from the general sense of 'inheritance' or 'reputation'.

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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.