The system supports only one M.2 SSD, though it can be either SATA or NVMe.   For storage, the faster SD cards are generally those rated for camera/video use -- but bear in mind that any SD card will be far slower than a native SATA or NVMe SSD.  
Hi folks - is it possible to fit a 2nd drive to the 7480 - e.g. M.2 SATA SSD or M.2 PCIe NVMe ? Can anyone advise a fast micro SD card for general storage, to avoid putting too much stuff on the SSD, and is NTFS the best format? Thanks for any advice,Kind regards, Niloc1017
Latitude E7480 Win10 queries