Try the Panasonic site and look for the operating manual for the particular camera model. I use a Panasonic Lumix LX1 and on page 107 of the manual there is a complete description of the filing sytem. The folder numbers start at 100 and the contents of each folder is 999. A new folder is created after this number is reached .It can all be reset at any time. Thereis a little programme called PHOTOme that gives more information about photos than I'll ever need including shutter activations,but I've only used it for DSLR. I'll give it a go for the compact .