EthStorage is a layer 2 solution that provides programmable, dynamic storage based on Ethereum's data availability. It will greatly reduce the storage cost of storing large amounts of data on Ethereum, saving it to 1% to 0.1%. The low cost of large data storage by EthStorage can better enable a fully decentralized network in the future. It is highly integrated with EVM and is compatible with Solidity, Remix, Hardhat, and MetaMask. The team has received a research grant from the Ethereum Foundation for data availability research.