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InfluxDB
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It depends on the link tbh. Lots of NFT use the ipfs network which is a decentralised protocol that makes files available based on their hash. So it doesn't matter which server/pc hosts the file, anyone could (even locally on your PC, you just need to have the same file)
For the people that keep saying you can simply change the stored file the NFT leads to, yes you can change it for some NFTs but not if your NFT is using peer to peer technology where you can't change the image like IPFS. Think of torrents. You can't change the files hosted by the torrent because the file signatures are hashed.