您好：QQ同步助手是腾讯公司开发的一个安全、免费的个人手机数据的备份管理服务软件。

Hello: QQ synchronization assistant is a safe, free personal mobile phone data backup management services to the Tencent Inc to develop the software.

youdao

您好：QQ同步助手是腾讯公司开发的一个安全、免费的个人手机数据的备份管理服务软件。

Hello: QQ synchronization assistant is a safe, free personal mobile phone data backup management services to the Tencent Inc to develop the software.

youdao