Fully tested in perfect working condition. The Western Digital WD Black SN770 1TB M. 2 NVMe Gen 4.0 SSD is a high-performance solid-state drive with a sleek black color and a form factor of 2280mm. With a read speed of up to 5150MB/s and a write speed that is 4 times faster, this SSD offers quick data access and transfer. The Western Digital WD Black SN770 is a reliable and efficient choice for enhancing the performance of your computer system.