Canon EOS 10D Digital Instruction Manual page 60

File Numbering Methods
•
If the 999CANON folder is created, [Folder number full] will appear on the LCD
monitor. You can keep shooting up to file No. 9999, however, you should keep a spare
CF card on hand.
•
If file No. 9999 in folder No. 999 is created, "
panel and in the viewfinder and no more images can be recorded even if the CF card
still has room. Replace the CF card with a new one.
•
The file numbers are like the frame numbers on a roll of film.
•
For details on file names, see "Basic Terminology." (→p.161)
60
" will be displayed on the LCD