The exponential growth of digital data has increased the demand for scalable, secure, and cost-effective storage solutions. Commercial cloud services offer convenience but introduce challenges such as recurring costs, limited storage, vendor lock-in, and privacy concerns. This paper presents the design and implementation of a private cloud storage system using TrueNAS SCALE, ZFS file system, and Nextcloud. The system converts legacy hardware into a cloud server that supports centralized storage, remote access, and multi-user collaboration. The proposed solution ensures complete data ownership, enhanced security, and cost efficiency, making it suitable for small organizations, educational institutions, and personal use.

This paper presented the design and implementation of a cost-effective private cloud storage system using TrueNAS SCALE and Nextcloud. The proposed system successfully transforms a conventional or legacy computing system into a fully functional private cloud server, capable of delivering enterprise-grade storage and cloud services. One of the major contributions of this system is the elimination of recurring subscription costs associated with commercial public cloud platforms. By adopting a one-time hardware investment model, users can achieve long-term cost savings while maintaining complete control over their data. This significantly reduces dependency on third-party service providers and avoids vendor lock-in issues. The system leverages the ZFS file system, which provides advanced features such as data integrity verification, snapshot capabilities, and efficient storage management. These features ensure high reliability, fault tolerance, and data protection. Additionally, the integration of Nextcloud enables a user-friendly interface for file access, sharing, and collaboration, making the system suitable for both personal and organizational use. From a performance perspective, the system demonstrates: High-speed data transfer in LAN environments Reliable remote access over WAN Low latency and efficient data handling Security is another critical strength of the system. It incorporates: User authentication and authorization Role-Based Access Control (RBAC) Dataset-level permissions Firewall-based network protection These mechanisms ensure that data remains secure, private, and accessible only to authorized users. Overall, the experimental results validate that the proposed system is: Efficient Scalable Secure Economically viable Thus, the system provides a strong alternative to traditional cloud storage solutions by combining performance, flexibility, and cost efficiency.

1.TrueNAS Documentation 2.Nextcloud Documentation 3.ZFS File System Architecture 4.Linux Server Administration Guides