All parts must have the exact same prefix (e.g., fg-01.bin.part01 , fg-01.bin.part02 , etc.) in the same folder.
For the sixth part of the original Lost Eidolons repack (v1.5.4), the "proper text" for the filename is: Lost Eidolons -- fitgirl-repacks.site --.part06...
(if you are looking for the .bin data files) All parts must have the exact same prefix (e
Use the Verify BIN files before installation.bat tool included in the download folder to check if part 6 is corrupted. Lost Eidolons -- fitgirl-repacks.site --.part06...