Filecoin (FIL), Arweave (AR), Storj (STORJ), and Sia (SC) are four well-known decentralized storage networks.

1. Filecoin (FIL): A decentralized peer-to-peer network utilizing blockchain technology, developed by Protocol Labs, officially launched in October 2020. It was initially designed as an incentive layer for the InterPlanetary File System (IPFS) protocol, allowing users to rent out storage space, creating a global network that operates without centralized data centers. Filecoin uses two consensus mechanisms, Proof of Replication and Proof of Spacetime, to ensure that data is appropriately replicated and stored long-term. Users participate in the network by staking nodes and earn FIL tokens by renting out storage space and bandwidth, with a total supply of 2 billion FIL.

2.Arweave (AR): Launched in 2018, it revolutionizes data storage with its innovative permanent and scalable data archiving network. The main feature of Arweave is the 'permanent web', designed for the everlasting storage of digital content, applications, and records. It uses a unique 'Blockweave' structure to achieve high redundancy by distributing copies of data across the network, allowing for indefinite data retention. Users pay for storage using AR tokens, with a total supply of 66 million AR tokens.

3.Storj (STORJ): A decentralized cloud storage platform founded in 2014 and headquartered in Atlanta, USA. Storj's global network of storage nodes collaborates to distribute data, enhancing the persistence and availability of information, offering up to 99.95% persistence and availability. It is S3 compatible and can seamlessly integrate with Amazon Web Services (AWS) and other S3-compatible tools. Storj uses end-to-end encryption, allowing users to fully own their data, with a pricing model starting at just $4 per month per terabyte (TB) of storage, and data egress charges of $7 per TB. The total supply of STORJ tokens is 425 million.

4.Sia (SC): A decentralized cloud storage platform based on blockchain, conceived by David Vorick and Luke Champine in 2013 and officially launched on June 6, 2015. Sia shards, encrypts, and globally distributes files, with storage providers only receiving encrypted file fragments and unable to access the file content. Users hold the encryption keys and fully own the data. Sia employs a dual-token model, with SC used for payments and being an inflationary token, and a security token SF that can receive trading dividends.