The Asus N7601ZW Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) Solid State Drives) Note: The primary M.2 (SSD1) slot supports PCIe NVMe Generation 4.0 x4 and 3.0 x4 Solid State Drives and the secondary M.2 (SSD2) slot supports PCIe NVMe Generation 3.0 x4 Solid State Drives.