A file is converted into a set of unidentifiable packets and then transmitted and stored on multiple nodes. There are no central servers in our system to attack. In addition, there is a secured communication channel, based on the same technology, between a user and the system.  If an attacker somehow intercepts all the packets he would not be able to assemble the file without the key (metafile).

Data owners pay 1$ per 1GB per month.

Nice concept for the coin, but already implemented in Storj and Siacoin. Which new things this brings to the table compared to these two coins?

Thank you for this very important question!
Just a brief comparison:
-    We don’t overload Blockchain network with all management and logging operations. We use it just for payments. Our SIZE algorithm manages the ecosystem autonomously: it controls operations and quality of nodes, manages their reputation and distributes data.
-    Our goal is not to create the cheapest storage. Our storage is most reliable and secure. So our storage nodes get good payment, while users get best protection and confidentiality.
-    We don’t use cryptography. We use correction codes which modify source information and convert any digital content into a new form — to the set of digital packages. Each of these individual packages has no functional value and may not even contain a single bit of the original information. To restore the initial information you have to reassemble a complete file from a set of packages in a specific way, performing series of mathematical operations.

Who are the founders?

Do we need An Absolute Protection From Quantum Supremacy?  There is no quantum computer yet.