The Samsung PM991a NVMe 256GB M.2 PCIe Gen3x4 SSD is a high-performance internal SSD designed for computers and laptops. With a storage capacity of 256GB, this SSD offers fast write speeds, thanks to its 4x faster feature. It is portable and utilizes the M.2 interface, making it a versatile and efficient storage solution for a range of devices. Made by Samsung, a trusted brand in the industry, this SSD is a reliable choice for those looking to upgrade their system's storage capabilities.