Samsung 870 QVO 4TB 2.5" SATA III 6GB/s 4-Bit MLC V-NAND SSD MZ-77Q4T0BW - Capacity: 4TB - Form Factor: 2.5" - Interface: SATA 6GB/s, Compatible with: SATA 3GB/S and SATA 1.5 GB/s - Controller: Samsung MKX Controller - Sequential Read (Max): 560MB/s - Sequential Write (Max): 530MB/s - Samsung V-NAND 4bit MLC - Cache Memory: Samsung 4GB Low Power DDR4 SDRAM - Random Read/Write: 98,000/88,000 - MTBF: 1.5 Million - MZ-77Q4T0BW - 3 Years Limited Warranty