When I convert from Dorico to uncompressed xml I get an empty white folder that is unusable and when I convert to the compressed one it saves the file in Finale and from there I can convert it to xml. Why?
Are you using Mac or Windows?
FROM Dorico? When you export to XML in Dorico, there is a dialog where you must select which Flows you want to export. There is also an option to put them in a folder.
I think it is saving an .mxl file, which by default will open in Finale.
MusicXML files may have the .xml, .mxl, or .musicxml file extensions; but all of them should open in apps that support MusicXML.