Thanks
@Neemobeer!
I just managed it to work properly now. So the problem seems solved for now!
BUT IT'S NOT REALLY SOLVED!!! SEE BELOW!
The wrong doing was to give the whole directory path as a symlink in:
mklink /D "D:\music\scales\songs according to scales\target" "F:\music\scales\songs according to scales\target"
The trick is rather to change to "D:\music\scales\songs according to scales" first (in the command window) and then
mklink /D target "F:\music\scales\songs according to scales\target"
So you create the directory link (last folder) in the second last folder which leads you then to the real destination folder where the real files have been copied to.
And copying the symlinks works fine with "xcopy /b "source-folder/*" "destination-folder", just as you said too
- - - - - - - -
CORRECTION:
I just realized that whenever I copy a "real" file to the target folder "F:\music\scales\songs according to scales\target"
it's been also copied into the symlink folder "D:\music\scales\songs according to scales\target" (means the real file with the same size)...
This wasn't what I actually wanted....
I'm not sure yet what that all means. At least it seems not to affect the used space of the D: drive, even after I copied about 150 MB of data to the real file folder in F:.
Quite strange!