Designed for IT professionals, content creators, and prosumers, the SANDISK 520 4TB SATA SSD delivers fast SATA read speeds up to 560MB/s and write speeds up to 525 MB/s to power high-performance PCs. Capacities from 500GB to 4TB on 2.5” form-factor are built with trusted SANDISK 3D NAND, up to 1,000 TBW (4TB model) endurance, and up to 2.25M hours MTTF reliability rating.