Are you talking about POC mining which is related to HDD mining? POC means proof of capacity and you mention about 3tb hard drive so I think you want is to mine with HDD?
Did you check this coin
https://bitcointalk.org/index.php?topic=731923.0i know it,but too old
any new coin ,use ipfs technology?
Also following projects can be mentioned: Storj, SiaCoin, Swarm.
But all these projects are also quite old.
The following article may be useful:
https://cryptobriefing.com/decentralized-file-storage-five-projects/