[itimpi]

Not quite sure what options you used to generate the catalog (maybe a screenshot of the Main tab might make this clearer). For the usage you describe I would just generate the catalog as a sub-folder within the main Calibre library and then include this subfolder in the files you already have online.

It sounds as if you have used the option to generate a complete copy of ALL of the files needed (including the book files)? This is unnecessary if you already have a copy of your Calibre library online.