Nikon D6 Reference Manual page 1176

1 Figures are for a Sony CEB-G128 128 GB CFexpress memory card (as of
December 2019).
2 Number of pictures that can be saved to memory card or stored in
memory buffer varies with scene recorded.
3 Maximum number of exposures that can be stored in memory buffer
at ISO 100. May drop in some situations, including when:
• An optimal-compression ( c ) JPEG option is selected for [Image
quality]
•
[On] is selected for [Auto distortion control]
4 Figures assume a size-priority option (an option not marked with c ) is
selected for [Image quality]. Selecting an optimal-compression ( c )
option increases file size; the number of images and buffer capacity
drop accordingly.
D
Maximum Number of Photo per Burst
The maximum number of photographs that can be taken in a single burst
can be set to any amount between 1 and 200 using Custom Setting d2
[Max. continuous release].
1124 Memory Card Capacity