Nikon D6 Reference Manual page 883

D
File Number Sequence
•
If a picture is taken when the current folder contains a picture
numbered 9999, a new folder will be created and file numbering will
restart from 0001.
•
When the current folder number reaches 999, the camera will no longer
be able to create new folders and the shutter release will be disabled if:
- the current folder contains 5000 pictures (in addition, movie
recording will be disabled if the camera calculates that the number of
files needed to record a movie of the maximum length would result in
the folder containing over 5000 files), or
- the current folder contains a picture numbered 9999 (in addition,
movie recording will be disabled if the camera calculates that the
number of files needed to record a movie of the maximum length
would result in a file numbered over 9999).
To resume shooting, choose [Reset] for Custom Setting d9 [File
number sequence] and then either format the current memory card or
insert a new memory card.
D
Folder Numbering
•
If a picture is taken when the current folder contains 5000 pictures or a
picture numbered 9999, a new folder will be created and selected as the
current folder.
•
The new folder is assigned a number one higher than current folder
number. If a folder with that number already exists, the new folder will
be assigned the lowest available folder number.
A Custom Settings: Fine-Tuning Camera Settings 831