var myDoc = app.documents[0];   
 if(!myDoc.isValid){alert('Nothing to do for this script as no ID-file is open.'); exit()}  
var myDocName = myDoc.name.replace(/.indd/, '');   
var theLinkedFilesPaths = myDoc.links.everyItem().filePath;   
  
var myExportPath = "~/Desktop/Test/"; //Hier auf korrekte Notation achten !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!  
var myTargetFolderPath  = myExportPath + myDocName + '/';    
   
var checkFolder = Folder(myTargetFolderPath).create();    
if(checkFolder === false){alert('Nothing to do for this script as the target Folder could not be created.'); exit()}  
  
    
for (var myCounter = 0; myCounter < theLinkedFilesPaths.length; myCounter ++ )    
{   
    theFile = new File(theLinkedFilesPaths[myCounter]);  
    if(!theFile.exists){continue}  
    theFileName = theFile.displayName;  
    theTargetPath = myTargetFolderPath + theFileName  
      
   var checkFile =  File(theFile).copy(theTargetPath)  
if(checkFile === false){displayDialog(theFile.displayName)}  
   
}   
  
function displayDialog(aString){  
var infoWindow = new Window("palette");   
infoWindow.add("statictext", undefined, "Problem: File with name " + aString+ " couldn't be copied.");   
infoWindow.show();   
$.sleep(1000);   
infoWindow.close();   
} 

 
#target Bridge  
  
var thumbnail = new Thumbnail(File.openDialog());  
var target = new Thumbnail(Folder.selectDialog());  
thumbnail.copyTo(target)