In this Internet era, data has become the first productivity and data security has gained more and more attention. Data loss or data damage, no matter due to human behaviors or natural disaster, will bring about immeasurable loss to enterprises. Therefore, restoring data from data replicas in the case of data loss becomes more important. On Sangfor HCI platform, the first backup is a full copy of data and the successive backups are incremental backups in which successive copies of the data contain only that portion that has changed since the preceding backup copy was made, which backs up less amount of data, occupies less space, and speeds up backup process as well. When a full recovery is needed, the restoration process needs the last full backup plus all the incremental backups until the point of restoration. Incremental backups are desirable as they reduce storage space usage, and are quicker to perform.