If you have already uploaded your artwork to IPFS and want to enter this information instead of uploading it again to IPFS, you can do so using Mintpad.
This mode is active when you create a new NFT project using the "Editions" or "Drops" mode.
The fields that you must fill in are:
IPFS URI where the artwork is located.
Important about the IPFSURI format of "Content Identifiers" (CIDs), some examples would be: