The images saved by the camera are encoded as "TC0nnnnn.JPG, where
nnnnn is replaced with a 5 digit numeric index, or Next Image Index. If the
Next Image Index value is 213, the next image file saved will have the
file name TC000213.JPG. The index is only loaded on power up,
so changes to this number will not be seen until the next power cycle.
It is wise to clear older images from the camera when the Index is set
to a smaller value, to prevent overwriting existing data.
When the FAT32 Image storage partition is reformatted, the image index is automatically
set to 1.