I want to upload bulk images for gallery in 'gallery' folder instead of default 'bulkUpload'. I am using 'colymba / gridfield-bulk-editing-tools 2.1.1'
here is my code

public function getCMSFields() {
 
    $fields = parent::getCMSFields(); 
    $gridFieldConfig = GridFieldConfig_RecordEditor::create(); 
    $gridFieldConfig->addComponent(new GridFieldBulkUpload());
    
    
    $gridFieldConfig->addComponent(new GridFieldSortableRows('SortOrder'));
    $gridfield = new GridField("GalleryImages", "Gallery Images", $this->GalleryImages()->sort("SortOrder"), $gridFieldConfig);
    
    $fields->removeByName("Content");
    $fields->addFieldToTab('Root.Main', $gridfield);
    return $fields;    
  }

insert the code after you add GridFieldBulkUpload component

$gridFieldConfig->getComponentByType('GridFieldBulkUpload')
    ->setUfSetup('setFolderName', 'ur-folder-name')
    ->setUfConfig('sequentialUploads', true);