How to make storage from 200 pcs?

Question

Active Directory

There is an ad domain with 250 client PCs. Each PC has a 500-1000 GB hdd. And on each of 50% free space. So I'm wondering how you can make distributed storage out of all of them, it is desirable that there are always 2 copies of 1 of the same file on different hdd. Well, or a managed file washer so that the files are scattered across different PCs, and the users themselves do not even know what they have stored. Some kind of cloud with a large volume)
Or is it fiction)? it's just interesting that the place on the hards disappears, and so you can fill it with something. centrally.

Answer 1

Also interested in a similar question.
I found something similar:
Network decentralized data storage Sia ,
Storj - decentralized distributed cloud ... ,
KAIROSPLANET
But all these solutions involve connecting to external management servers, but it is necessary with the ability to use the internal server of the enterprise.