This paper presents a blockchain-based decentralized disk rental system designed to securely and efficiently utilize unused storage capacity. Unlike traditional cloud storage models reliant on centralized providers, this system integrates blockchain technology with the Inter Planetary File System (IPFS) to establish a decentralized, tamper-resistant storage solution. Smart contracts automate storage agreements, ensuring transparency and immutability, while advanced cryptographic techniques and proof mechanisms guarantee data integrity and confidentiality. Leveraging lightning network technology for fast, low-cost transactions, the system distributes data across a decentralized network of nodes, significantly enhancing data privacy, security, and availability. This architecture addresses key vulnerabilities of centralized storage models, such as single points of failure and data breaches, offering a robust, scalable alternative for distributed storage applications. The proposed solution provides a promising pathway for more secure and resilient storage infrastructure in decentralized environments