Check the log file saved in the "documents" folder in rekordbox. Can't export a majority of my music to my USB! PLZ HELP

I've analyzed, deleted, re-analyzed all my music but I still can't export a majority of my music to my USB. I keep getting a window saying to check the "documents" folder in rekordbox to see what files were not able to export but all my files are all found in the designated folders under a desktop folder. The songs that are able to export are in the same folders as some that cannot be exported. Someone, please help me. The music is playable even the ones that cannot be exported. Also, they do not have a yellow question mark next to them.