final List<String> fileNameItems = new ArrayList<>();
        final List<File> fileList = getAccessibleFileList(baseDir);
        final int length = baseDir.getAbsolutePath().length();
        for (final File file : fileList) {
            fileNameItems.add(file.getAbsolutePath().substring(length));
        }
        return fileNameItems;
    }

    // ===================================================================================