English to Chinese Tech/Engineering IT (Information Technology) backuping

The platinum rule
It doesn’t get any more basic in backup than {the rule of three}. To lower the risk of data loss to the freak-karmic-event level, you must have three copies of your important data: the original, a backup of the original, and a backup of the backup. The secondary and tertiary copies should be in different locations: Ideally, keep one on premises (local) for swift restores and recovery, and keep one off-site where it isn’t subject to the same physical threats (lightning, flood, theft, and the like). Remember that the rule of three is a practical minimum—an extra copy here and there won’t hurt.