Uploading nft metadata to ipfs

Hi,

I have an issue with metadata. I am using Openzeppelin ERC 721 preset.
I established a IPFS folder with metadata files 0, 1 etc; next, I minted token with tokenURI “ipfs://-CID-/0”; however I cannot found docs.

Eg, someone has done: https://ipfs.io/ipfs/QmXrU7bK8C9ZVuWwDs5PgpM31CCYbDg3mzgAQhZHKZdpQU/0
https://ipfs.io/ipfs/QmXrU7bK8C9ZVuWwDs5PgpM31CCYbDg3mzgAQhZHKZdpQU/1
https://ipfs.io/ipfs/QmXrU7bK8C9ZVuWwDs5PgpM31CCYbDg3mzgAQhZHKZdpQU/2

Can you please help me how to resolve this one?

Thanks!