First: All the books in the list (Calibre) need
unique Titles and Authors (this is normal for regular books). OTOH Periodicals usually have a date or Issue# to break a tie: Analog Jun 2022
GIGO those must be Unique.
With the
device connected:
Right click the Device Icon (only shows when there is a device): Configure:
This is mine for My Kobo, it includes Series_index so I know the order.
Code:
MyBooks/{series}/{series_index:0>2s||-}{title}-{authors}
The typical Calibre default part
is in bold