getCardPath.java

 public String getCardPath() {
        String removableStoragePath = "";
        File fileList[] = new File("/storage/").listFiles();
        for (File file : fileList) {
            if (!file.getAbsolutePath().equalsIgnoreCase(Environment.getExternalStorageDirectory().getAbsolutePath()) && file.isDirectory() && file.canRead()) {
                removableStoragePath = file.getAbsolutePath();
            }

        }
        return removableStoragePath;
    }