protected function normalizeBytes($bytes)
    {
        $filteredBytes = filter_var($bytes, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
        list ($bytes, $part) = explode('.', $filteredBytes . '.0');
        if (bccomp($part, 0) == 1) {
            $bytes = bcadd($bytes, 1);
        }

        return $bytes;
    }