CATA project started as the decentralized storage solution for FLOW blockchain. We adopt a design scheme that decouples storage and retrieval functionality. The bottom layer is a persistent decentralized file storage network built through the IPFS protocol. We docked Drill on top of the decentralized file system and built Minerva Layer. The whole decentralized storage system can provide scalable storage functionality for the upper Blockchain Systems and Dapps through Minerva Layer.