This article explores integrating blockchain into decentralized cloud storage, examining its implications, challenges, and prospects. It begins with blockchain fundamentals and its impact on cloud storage, highlighting enhanced security, privacy, and resilience through encryption and decentralized consensus. The literature review synthesizes research on blockchain technology, cloud storage trends, and decentralized solutions, emphasizing benefits like improved data integrity and cost-efficient storage. Case studies in healthcare, supply chain, finance, and media demonstrate blockchain's potential in revolutionizing data management. However, challenges such as scalability, regulatory uncertainties, and security vulnerabilities are addressed, calling for research in transaction throughput and interoperability. Emerging trends include hybrid blockchains, AI integration, and incentive mechanisms. The article concludes by outlining future research directions to enhance scalability, privacy, and security in blockchain-based decentralized cloud storage, envisioning a future of secure and transparent data management solutions.