Storage systems is a field of academic and engineering inquiry dedicated to the principles, design, implementation, and management of digital data repositories. It investigates the methodologies and technologies by which digital information is persistently stored, organized, accessed, and protected. The field encompasses the study of various storage architectures, data structures, access protocols, reliability and availability mechanisms, performance characteristics (such as latency and throughput), scalability, security, and economic considerations across diverse storage media and scales, ranging from local devices to global distributed infrastructures. Its significance lies in providing the essential infrastructure for data persistence, retrieval, and processing, underpinning nearly all computational activities and data-driven advancements.