Olympus C-2100 Ultra Zoom Instructions Manual page 161

AUTO
When AUTO is selected, the same folder number and a continuing num-
ber from the last file number of the last card will be used, so that the
same file number will not be used for pictures taken together and saved
in multiple cards.
Folder No.101
When images are transferred to a computer...
Even when pictures are stored in multiple cards, a different file number will
be used for each. This will continue until 9999, when numbers will start
over again at 0001.
For convenience, the folder numbers remain the same when transferred to
a computer.
\ DCIM \ *** OLYMP \ Pmdd **** .jpg
Card change
File No.
0005
Folder No.
Folder No.101
File No.
starts from
0006
161