The OWC Mercury ACCELSIOR PCIe Express SSD 120 GB is a high-performance internal solid-state drive compatible with both PC and Mac systems. With a storage capacity of 120 GB, this SSD provides fast data transfer rates and ample storage space for a variety of applications. Designed by OWC, this SSD is ideal for enhancing the speed and responsiveness of your computer system, making it a reliable choice for improving overall performance.