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Storage should be on the Blockchain, clearly way out of these Devs reaches, if people want to see how real Decentralized on the BLOCKCHAIN is done, they should check out I/OCoin.
But be careful, the posters in that forum are a bunch of little girls.
Can't tell if sarcastic or not... Assuming not, that's insanity. What if five people want to store a couple TB on the blockchain. All of a sudden there is no one who wants to store the blockchain. I'm not betting Sia is going to be bigger than Dropbox, but it's certainly a more feasible and practical way forward than just jamming everything into a the blockchain.