The Samsung PM991 256GB internal M.2 solid state drive is a high-performance storage solution designed for PCs. With a sleek black color and compact M.2 form factor, this SSD offers fast transfer rates of up to 550 Mbps and a storage capacity of 256GB. It features a hybrid HDD/SSD storage format and a cache size of 256 MB, providing low noise levels and improved write speeds. Backed by a 1-year manufacturer warranty, this Samsung PM991 drive is a reliable choice for enhancing the performance and storage capabilities of your computer system.