thanks.
one more thing.
how do you install Logic itself to another location / hard drive?
since it's just an .app file I thought I just put it on my desired hard drive.
then I installed all the content on the root of the same hard drive with your script.
but when I opened Logic it started the download of the 2GB basic content and after that it would get stuck at the installation process for like forever.
but as soon as I put the Logic app back to the Apps folder on the system drive, the installation process was finished only in a few minutes.
Of course after that I could put the Logic app back on my other hard drive but it didn't find the additional content and wanted to download and install all of it again...
Before all of this I also tried it with symlinks but that didn't work out either...