The Western Digital Black SN850X 4 TB M.2 PCIe SSD offers high-performance storage for demanding computer applications. This internal solid-state drive utilizes the PCIe 4.0 interface with NVMe 1.4 technology, achieving sequential read speeds of up to 7300 MB/s and sequential write speeds of up to 6600 MB/s for fast data transfer. The 4 TB capacity provides ample storage space for large files, applications, and multimedia content. With a single-sided M.2 2280 form factor measuring 80 mm in length, 22 mm in width, and 2.38 mm in height, it fits into most compatible motherboards and laptops. The drive features a proprietary Western Digital controller and 3D TLC NAND flash memory for consistent performance and reliability. The endurance rating of 2400 TBW (Terabytes Written) supports intensive workloads over extended periods. The included heatsink model helps maintain optimal operating temperatures during prolonged use. This SSD is suitable for gaming systems, content creation workstations, and professional applications that require fast storage access and large capacities. The operating temperature range is between 0 °C and 70 °C, with a weight of approximately 9 g. The product requires a motherboard with an M.2 slot that supports the PCIe 4.0 x4 interface for full performance. As a successor to the SN850 series, it offers backward compatibility with PCIe 3.0 systems at reduced speeds. Installation is straightforward with the included mounting screw, and the drive is pre-formatted for immediate use with most operating systems.