M2 Wifi sockets are E keyed or A and E keyed not B or M Keyed. Wont work with a ssd drive An M.2 SSD is “keyed” to prevent insertion of a card connector (male) to an incompatible socket (female) on the host. The M.2 specification identifies 12 key IDs on the module card and socket interface but M.2 SSDs typically use three common keys: B, M, and B+M M2 is a socket not a storage standard. [IMAGE]M2 is a socket not a storage standard   [IMAGE]A E keyed wifi [IMAGE]E keyed is not B or M  
I was wondering, I do not use WiFi, I use ethernet and always will. Could I put another M.2 SSD in that slot and have two M.2 drives? Just curious. All the manual said is (M.2_SLOT1) it does not say exactly what it's for although Dell uses it for a WiFi Card. 
XPS 8930, (M.2_SLOT1), use for M.2 SSD?