[tb21]

Ok, thank you, I think that could answer some of my questions, I will try some more. o) So the newer methods return null/object and create parents, is there any drawback using the new methods or any reason to still use the old ones?

EDIT: Found the source for some of the file/folder methods here, seems helpful to explore the differences:
github.com/mirror/jdownloader/blob/master/src/org/jdownloader/extensions/eventscripter/sandboxobjects/FilePathSandbox.java