The Samsung PM991a 256GB NVMe M.2 2242 SSD MZALQ256HBJD-00BL2 is a high-performance internal SSD designed for use with laptops and PCs. With a sleek black design, this SSD offers fast transfer rates of up to 550 Mbps and a storage capacity of 256GB. It features a PCIe Gen3 2280 adapter, M.2 interface, and NVMe technology for efficient data processing. The SSD also boasts a cache size of 256MB and a form factor of 0.7 inches, making it a compact and powerful storage solution for various computing needs.