Copy-Paste"
Most decentralized storage systems rely on simple replication. To keep a file safe, they copy it dozens of times across different nodes. While this works, it is incredibly inefficient and expensive. You end up paying for 10x or 20x the storage you actually use.
Walrus solves this with Erasure Coding (specifically their novel "Red Stuff" algorithm). Instead of copying the whole file, it breaks data into mathematical shards. You only need a fraction of these shards to reconstruct the original file. This allows Walrus to store data with a much lower replication cost—making it significantly cheaper than competitors without sacrificing security.