Sustain demanding application tiers with 3.2 TB of NVMe flash in a compact E3.S enterprise drive format. The HPE P70399-B21 is designed for mixed-use environments where read and write activity must stay balanced across virtualization, database, and analytics workloads. NVMe connectivity reduces storage bottlenecks compared with legacy SATA and SAS designs, helping servers deliver faster access to active data. This drive fits infrastructure teams building dense, high-throughput systems that need more usable capacity per chassis without sacrificing responsiveness. The mixed-use profile makes it a strong fit for workloads that see sustained activity rather than light archival duty. In practice, that means fewer compromises when consolidating applications, scaling virtual machines, or supporting transactional systems that cannot tolerate storage lag. For enterprise buyers, the value is not just capacity. It is the combination of NVMe protocol efficiency, E3.S packaging, and HPE qualification for server environments. That combination helps justify the premium over commodity SSDs by reducing latency risk, improving chassis density, and aligning the drive with production storage tiers where consistency matters.