Nero BackItUp is a consumer oriented solution and doesn’t utilize the typical incremental or differential backup strategies know from enterprise solutions. Instead there are two backup modes:
Local copy / Online copy doesn’t apply any file versioning, each file only exists once in the one and only backup set, so the backup can be browsed in Windows File Explorer easily
- Unchanged files that have been backed up before won’t be backed up again
- A file deleted from the source data won’t be deleted in the backup set
- A file modified in the source data will overwrite the file in the backup set on next backup
- A file renamed or moved in the source data will be added like a new file to the backup set
- A files added to the source data will be added to the backup set
- This is the only mode that allows continuous backup and it is not available for optical discs
- There is only one single entry for the one backup set (per backup job) on the restore page
Local snapshot applies a similar concept but saves new/modified files into new backup sets, so all the different versions of a file are kept over time
- Unchanged files that have been backed up before won’t be backed up again
- A file deleted from the source data won’t be deleted in the previous backup set
- A file modified in the source data will be available in the next backup set
- A file renamed in the source data will be added like a new file to the next backup set
- A files added to the source data will be available in the next backup set
Local snapshots on optical discs are always a full backup every time the job is run.
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