The Crucial M550 2.5 SSD 128GB is a high-performance internal solid-state drive designed for use in laptops and PCs. With a sleek silver design, this SSD offers fast read speeds of up to 550MB per second, making it ideal for demanding computing tasks. It features 128GB of storage capacity, SATA III interface, and is RoHS compliant for environmental sustainability. The Crucial brand is known for its reliability and quality, making this SSD a great choice for enhancing the speed and efficiency of your computer system.Used. Tested working.