I’ve written a guide on how to store files on the Creditcoin blockchain. Please be warned that anything uploaded will be stored on the blockchain FOREVER and cannot be removed, so be careful what you upload.
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# Abitrary File Storage on Creditcoin Blockchain
Creditcoin includes the ability to write files to the Blockchain using the `system.remark` extrinsic type. This allows for arbitrary files to be stored on the Creditcoin blockchain. In this example, we'll take the Creditcoin Whitepaper (https://docsend.com/view/2zwzxde) and store it within a block on the Creditcoin 2.0+ mainnet.
## Upload the file
Browse to https://cloudflare-ipfs.com/ipns/dotapps.io/?rpc=wss%3A%2F%2Frpc.mainnet.creditcoin.network%2Fws#/extrinsics and from the dropdowns, choose a wallet to pay the cost of storing the file, `system` as the extrinsic type and `remark` as the extrinsic sub-type.
Under `remark: Bytes` select the `file upload` option and then drag a file onto the screen or select a file by clicking where it says `click to select'
Once a file is selected, it will be encoded and ready to submit to the blockchain.