2TB is the maximum amount of microSDXC storage and up to 300MB/s speeds under UHS-II U3 format.
Sorry guys I got worried when watching those leaked slide shows the other day with no mention of microSD card storage support for 950/950 XL was listed but only for Lumia 850 had microSD card storage support from those slides.
This is the microSDXC card I'm getting for my 950 XL ordering October 15 hopefully I get in time.
http://www.bhphotovideo.com/c/produc...pUvbUpU3239124 I did some research it seems to be a good one! ....any alternatives'?