Nikon D780 DSLR Camera (Body Only) - Manual (Page 595)

549 Menu Guide > C The Photo Shooting Menu
D Folder and File Numbers
• Once the folder number has reached 999, the camera will stop creating
new folders automatically and disable the shutter release if:
- The number of files in the folder reaches 5000 (or during movie
recording, if camera calculates that the addition of the number of files
needed to create a movie of maximum length would bring the total
over 5000)
- The file number reaches 9999 (or during movie recording, when
camera calculates that the number of files needed to create a movie
of maximum length would result in a file numbered higher than 9999)
• If there is space on the memory card, you will nevertheless be able to
continue shooting by:
- Creating a folder with a number less than 999 and selecting it as the
storage folder
- Changing the options selected for [ Frame size/frame rate ] and
[ Movie quality ] before recording movies
D Startup Time
Additional time may be required for camera startup if the memory card
contains a very large number of files or folders.