To control where the photos are saved, and the filenames used to each photo, you need to customise the "Filename Expression" option.
This page explains in more detail:
i hope A new folder is created on the BATCH number or SEQUENCE number of the camera.
Since name-policy settings are stored only in one folder,
It is too hard to sort pictures when you shoot more than 100 cameras continuously.
How can there be a better way?