local backup

例句：

1. 1. We need to back up our data locally before we can restore it.
   在恢复数据之前，我们需要本地备份数据。
2. 2. The local backup was successful, but the server crashed again.
   本地备份成功了，但服务器又崩溃了。
3. 3. I'll make a local backup of my files before I upload them to the cloud.
   在上传文件到云之前，我会对文件进行本地备份。