dell 5580 m.2 nvme

Ok, one of my RM Clients has a Dell Latitude 15 5580 with a 256 SSD drive that is almost full. I want to upgrade to a 1TB. I have not seen the guts of this laptop and it is NOT in front of me at the moment. However, my RMM reports it has an SK Hynix SC308 which is an M.2 interface SATA...