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In this article, I will be showing you how to create a Dapp that allows us to store data on the Arweave network, using bundlr on testnet. We will be using Nextjs, Chakra UI, RainbowKit and RainbowKit. Bundlr has a devnet which allows you to use devnet/testnet cryptocurrency networks to pay for storage. The devnet node behaves exactly as a mainnet node - other than data is never moved to Arweaves and will be cleared from Bundlr after a week.