I’m getting rate limit error when uploading my NFT files

Because we use nft.storage to store your NFT files on IPFS, there’s a limit on how many files you can upload at once. Currently, the rate limit will be triggered if the nft.storage API receives more than 30 requests using the same API key within a 10-second window.

What you can do is reduce the number of NFTs you wish to mint at once which in effect will reduce the number of files being uploaded to nft.storage at once.