backup : Idioms & Phrases
backup file
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noun (computer science) a computer file dedicated to storing and updating computer backups
WordNet
backup man
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noun someone who takes the place of another (as when things get dangerous or difficult)
stand-in; fill-in; substitute; relief; backup; reliever.
- the star had a stand-in for dangerous scenes
- we need extra employees for summer fill-ins
WordNet
backup system
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noun a computer system for making backups
WordNet
computer backup
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noun (computer science) a copy of a file or directory on a separate storage device
backup.
- he made a backup in case the original was accidentally damaged or erased
