Built for creators, the 4TB Optimus 5100 NVMe PCIe 4.0 M.2 Internal SSD from SANDISK strikes a balance between performance and affordability. Built for desktops, laptops, and other devices with an M.2 2280 form factor and a PCIe 4.0 x4 interface, this SSD delivers sequential read speeds of up to 6900 MB/s and sequential write speeds of up to 6700 MB/s. Users will also have access to drive security via TCG Pyrite 2.01, while a TBW (Total Bytes Written) rating of 1200TB and an MTTF (Mean Time to Failure) rating of 1.75 million hours help ensure a long operational life. SANDISK Dashboard software (Windows only) lets users update their drive and fine-tune its performance, while Acronis True Image software lets you migrate your old drive to this new one.