I was watching Phil's hands on video and he mentioned that the note 4 will support up to 64gb sd card. Seems odd, as my note 3 and many older phones can use 128gb. I don't see any reason why a 128gb won't work, but I will take Phil's word on it.
http://www.androidcentral.com/samsung-galaxy-note-4-hands-on
Sent from my LG G Pad 8.3
http://www.androidcentral.com/samsung-galaxy-note-4-hands-on
Sent from my LG G Pad 8.3