There are many choices available, some are stated in my backup page. The best choice for SOHO is to purchase a tape drive that has a automatic backup program such as Retrospect. A tape can hold gigabytes of information. A competent solution will guarantee that your data will be available to you when you need it. Retrospect Express Backup backs up your data incrementally.
Incremental backups copy only files that have been amended since the last backup.
Since the backups are incremental, it would enable you to go back to a particular day to recover a file. Retrospect allows you to recover one file or the entire hard drive. Points to consider with your backup Backup at an interval that preserves the integrity of your data. Check the integrity of the backup so that you know it is viable. Store one of more complete sets at a remote location and rotate them once a day, week, or any interval allows you to recover your business entirely.