Sia

Sia is a decentralized cloud storage platform secured by blockchain technology. When a file gets uploaded to Sia, it gets split up, encrypted, and sent all over the world. Renters upload files, hosts store those files, and everything is automated. Once you upload your files, the network ensures that they're always accessible to you by copying them multiple times. And they're never accessible to hosts because they only receive pieces of whole files that are already encrypted. Sia has its own blockchain, and a utility token that powers it – the Siacoin.