# On-Chain Storage Constraints

For storing data on-chain it's important to keep in mind the following:

- You can store an unlimited amount of file, but will cost you 1N per 100KB
- There is a 4mb limit on how much you can upload at once

Let's say for example, someone wants to put an NFT purely on-chain (rather than IPFS or some other decentralized storage solution) you'll have almost an unlimited amount of storage but will have to pay 1 $NEAR per 100kb of storage used (see [Storage Staking](https://docs.near.org/concepts/storage/storage-staking))

Users will be limited to 4MB per contract call upload due to MAX_GAS constraints. The maximum amount of gas one can attach to a given functionCall is 300TGas.