Award Winning WD Blue 3D NAND SATA SSD. Capacities up to 4TB with enhanced reliability. An active power draw up to 25% lower than previous generations of WD Blue SSD. Sequential read speeds up to 550 MB/s and sequential write speeds up to 525 MB/s. An industry-leading 1.75M hours mean time to failure (MTTF) and up to 100 terabytes written (TBW) for enhanced reliability. WD F.I.T. Lab certification for compatibility with a wide range of computers. Free downloadable software to monitor the status of your drive and clone a drive, or backup your data.