Upgrade your computer system's speed and capacity with the 4TB WD Blue 3D NAND SATA III 2.5" Internal SSD. With a sequential read speed of up to 560 MB/s and 530 MB/s sequential write speed, this 2.5" / 7mm solid-state drive is designed to deliver fast performance for demanding applications. Featuring 3D V-NAND technology, the WD Blue 3D NAND drive is built to quickly boot up your operating system and decrease load times for applications and files, making video editing and 3D modeling projects faster and more efficient. Gamers may spend less time waiting for games and levels to load and more time playing comparted to mechanical hard drives. Additionally, with no moving parts, solid-state drives are generally tougher and have a longer lifespan than mechanical drives. You can download the Western Digital SSD Dashboard to monitor your drive's health and Acronis True Image WD Edition to clone your drives and backup your data. This drive is packaged in a retail box.