final String secretKey = fessConfig.getStorageSecretKey();
        final String bucket = fessConfig.getStorageBucket();

        // Get explicit type or auto-detect
        final String typeStr = fessConfig.getStorageType();
        final StorageType type;
        if (StringUtil.isBlank(typeStr) || "auto".equalsIgnoreCase(typeStr)) {
            type = detectStorageType(endpoint);
            if (logger.isDebugEnabled()) {