The Dell Latitude 7400 Laptop Supports Single Drive Configuration Only. (One M.2 NGFF (2280) or (2230) Solid State Drive) Note: The M.2 (2230) Drive uses a adapter bracket p/n 07HMH to accommodate for the larger M.2 (2280) slot. If upgrading from a M.2 SATA Drive to a M.2 PCIe NVMe Drive, you will need the M.2 thermal heatsink cooling bracket p/n M52FX for installation. (The M.2 slot supports SATA and PCIe NVMe Solid State Drives)