ok, is there another way to have a folder like to put thinks in there, then to be able to list the content, to see what files do you have?

I am not sure if this is a solution to your problem, but you can check the ipfs-car lib: https://www.npmjs.com/package/ipfs-car. You can work with car files like with standard archives, but yes, depending on the content, the CID will be different if you add something, but here at least you can know the CID before uploading it Btw. nft.storage provides simple uploads of such files

well with ipns it wouldn't matter if the new folder got a new cid, because you would just update the name binding for it. But that wont work in many cases for elrond ?