Another copy should be stored at an off-site location in case of a fire or some other contingency. Consider making arrangements with another department to store your backup tapes off-site. Data Safes are fire-resistant safes specially designed to protect magnetic media from damage caused by magnetism, fire, heat, water and airborne contaminants such as smoke and dust. Various backup techniques should be employed, including full backups and incremental backups. Full backups are used for total system recovery.
Incremental backups use less media and are faster to run.
Incremental backups are generally used to recover old versions of files and to restore file integrity when files become corrupted.