You seem badly informed, I would recommend to checkout the Sia website or /r/siacoin.

In short:
Data is split and stored on 30 (soon 50) different hosts and is of course encrypted, so no one without your private key can access your data. (they would have to hack your private key, which is atm pretty much impossible).

As it is now, you need only 10 of your 30 hosts to restore your data - so even if up to 20 hosts get their pc thrown out of the window, your data is safe and will be added to 20 new hosts as soon as the network marks these 5 old hosts as inactive.

Additionally these hosts have to play a sum of Siacoins when setting up their hosting space and will lose this investment if they can't provide a 90% uptime of the storage.

I think Sia roadmap is insane(ly good). They have a real product to disrupt the market.