Backup: full, differential, incremental

A question from Yahoo! Answers:

What is meant by : FULL BACKUP, DIFFERENTIAL BACKUP , INCREMENTAL BACKUP?

Full backup copies all files from source location to the backup location.

Differential backup only copies files that have changed since the last full backup.

Incremental backup only copies files that have changed since the last backup, regardless of whether it was a full, differential, or incremental backup.

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