Any standard M.2 2280 NVMe drive that fits, should work. 
Hi! I just bought a second hand Dell Latitude E7470 Dell Latitude E7470 i5-6300U 2.40GHz 8GB Ram (No trackpoint) and without Storage Drive, I would like to get some help about compatible Nvme M.2 SSD drives before make any mistakes and purchase the wrong one. I was thinking about the XPG SX8200 Pro 512GB 3D NAND NVMe Gen3x4 PCIe M.2, according to the user manual this laptop is compatible with PCIe 3.0, has anyone used this same drive on this laptop model? can anyone suggest which other SSD M.2 drives can I buy for this model? (512 GB or 500 GB) Thanks in advance!  
XPG SX8200 Pro 512GB 3D NAND NVMe Compatible with Dell Latitude E7470