The Crucial m4 SSD, in a 7mm z-height form factor, delivers unparalleled performance for today's new thin & light form factor laptops without sacrificing capacity, performance or quality. Designed for the rigors of mobile computing, the m4 SSD delivers faster boot and application load times enhancing your overall experience. And because Crucial is part of Micron, the m4 was built entirely in-house with Micron-produced NAND, ensuring you'll get one of the highest quality products available.