The Lenovo ThinkPad X1 Extreme 3rd Generation Laptop Supports Single and Dual Drive Configurations. (Two M.2 NGFF (2280) Solid State Drives) Note: M.2 Drives with PCI NVMe Generation 4.0 x4 performance is downgraded to closer to Generation 3.0 x4 performance due to the system slot limitation. This machine supports RAID 0/1 configurations.