HBase provides scalability by using a distributed architecture. This architecture distributes the data across multiple nodes and allows for horizontal scaling. For example, if more storage is needed, additional nodes can be added to the cluster. HBase also provides automatic sharding of data, which helps to spread the load across the cluster. This ensures that the cluster can handle large amounts of data while still providing quick response times. Additionally, HBase provides a fault-tolerant environment, which helps to ensure that data is not lost even if a node fails.