The Western Digital PC SN520 256GB M.2 2230 NVMe SSD PCIe Gen3 x2 is an internal SSD designed for PC compatibility. With a read speed of 2400MB/s and a storage capacity of 256GB, this SSD offers fast and efficient data transfer. The blue-colored unit features low noise levels and a cache size of 256MB, making it a reliable choice for improving the performance of your computer. Made by Western Digital, a trusted brand in the industry, this SSD is part of the WD Blue product line and is a great option for those looking to upgrade their storage capabilities.