The Dell Inspiron 15-3535 Laptop Supports Single Drive Configuration Only. (One M.2 NGFF (2280) Solid State Drive or One M.2 NGFF (2230) Solid State Drive) Note: The M.2 (2280) and (2230) Drives use different thermal support brackets and cannot be interchanged. If installing a M.2 (2280) Drive, you will need the M.2 (2280) thermal support bracket p/n 0FP8R3 for installation. If installing a M.2 (2230) Drive, you will need the M.2 (2230) thermal support bracket p/n 037Y7P for installation. (The Dell Inspiron 15-3535 Laptop supports PCIe NVMe Gen4.0 x4 and Gen3.0 x4 Solid State Drives)