Currently the "Unused File" search only checks whether the files themselves are unused/unreferenced.

However, it would be logical to also consider a file to be unused, if all uses of that file are in files that are themselves unused.

For example, as of v2.4-20240424, in "Baldur's Gate: Siege of Dragonspear v2.6.6.0", LENORE.DLG is not considered unused. However, it is only used in LENORE.CRE. Since LENORE.CRE is unused, LENORE.DLG should also be considered unused.