Western Digital Ultrastar DC SN655 WUS5EC0B1ESP7Y3 30.72 TB Solid State Drive - U.3 15 mm Internal - PCI Express NVMe (PCI Express NVMe 4.0) - Read IntensiveThe Western Digital Ultrastar DC SN655 delivers enterprise grade NVMe performance and reliability in a high capacity 30. 72 TB drive designed for data centers and demanding workloads. Built for read intensive operations, this U. 3, SFF 15mm form factor SSD combines PCIe Gen4 speed with dual port redundancy, ISE features, and a robust feature set that helps data centers optimize throughput, reduce latency, and scale storage capacity without