High-speed protocol for SSD data transfer.

• Non-Volatile Memory means the storage retains data even when power is off (like flash storage in SSDs).
• Express refers to the fact that NVMe uses the high-speed PCIe (Peripheral Component Interconnect Express) interface to connect storage directly to the CPU.
• Why it matters: NVMe delivers much lower latency, higher throughput, and better parallelism than SATA/SAS, making it ideal for modern AI/HPC.