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duplicated in all archives and take additional space on backup media. To tackle this issue there has been developed a

supplementary technique called Differential Sector Backup.

A differential archive only contains data changed since the time of creating a full archive, which forms a base (or a

parental image) in this case, thus considerably saving your system resources. It is realized by the exact bit-wise

comparison of the previous partition's data (saved in the parental image) with the current data (that is actually the

partition itself). To restore this kind of backup you will require a full image and one of its differentials, what is very

convenient.

This function is only available for single primary and logical partitions.

Full and Incremental File Backups

A full file-based archive only contains files and folders. It is really efficient when backing up an e-mail database or

particular documents, as no redundant data is processed. But if you care about maintaining a files history, you can

benefit from one more supplementary technique called Incremental File Backup.

An incremental archive only contains data changed since the time of creating a full or incremental file-based archive. It

is smaller and takes less time to create, but you will require the initial full image and all of its increments to restore the

latest point of this kind of backup.