[itimpi]

I think there is an element of confusion here still?

You cannot change the internal structure of Calibre's library. That is under Calibe's control and cannot eb changed. The template you mentioned is not for the internal structure, but for exporting files.

When you export a file from the Calibre library via Send to Device (normally USB) or Save to Disk then you can supply a template that controls the folder/filename structure you want to use for the exported file. For the Send to Device option, you can different templates for different devices as the template is set at the device driver level.

If you are downloading from the Content server ovr a network then Calibre simply provides the file. The client end decides where to place it.