If I store file chunks in the blocks, I'm causing duplicated blocks all over the networks (I mean, my file's chunks will be in each computer on the blockchain network, So eventually I have many many copies of this file in each block of each computer). On the other hand, If I store reference to the file in the block(for example, the block will hold: Myfile.txt stores in IP: 18.104.22.168 and 22.214.171.124) each computer that has my file, can change it easily. and even If i'm checking whether 126.96.36.199 or 188.8.131.52 (my example above) changed my file, and the answer is "True" (by comparing file's hash before and after storage) , I still don't get my file, and the data storage on blockchain is pointless.
So, how does companies like Storj works? how do they store the data on the blockchain? (As I understood, storj store references on the blocks, to 3 computers that holds my file, so how do they avoid my problem which I mentioned above?)
Thanks in advance.