Spaces in source folder path don't create sub-dirs in target path

[Horst12]

I made an entry for a Thunderbyte local mail-dir
The full source path is
C:\Users\horst\AppData\Roaming\Thunderbird\Profiles\eypx4io3.default\Mail\Local Folders-maildir
The target path is simply D:\backup\mail
There are no sub-dirs created in the target dir.
Enclosing the source path with "" doesn't help.
It only copies files from the source into the target.

[stefankueng]

subdirs are only created it they're not empty.