The NETZON intelligent offline storage device is designed to manage NETZON-standard disc cartridges, enabling comprehensive offline disc querying and management. When used in conjunction with the NETZON disc library, it can be flexibly configured into a "nearline + offline" massive storage system. By transferring infrequently accessed yet long-term retention data to offline storage devices, it significantly alleviates nearline storage demands. This approach not only reduces overall storage costs and enhances system performance but also facilitates the preservation of duplicate data copies in remote locations.