SDExplorer 有免费的也有专业版（就是收费的意思）
免费版本可以拥有大部分的功能，一般的上传下载都可以像在操作自己的硬盘一样。
What is SDExplorer
Looking for a fast and convenient way to work with your files stored using Microsoft’s SkyDrive™ service?
You’re on the right track!
SDExplorer is a free, easy-to-use, but very powerful extension for Windows Explorer. With SDExplorer you can perform all everyday operations with your documents on Microsoft Live SkyDrive™ using Windows Explorer, as if they were on your computer itself.
Moreover, you don’t need to install and configure any additional programs or ActiveX components. SDExplorer will take care of communicating with the online storage all by itself.
Why do you need SDExplorer
- If you want to make your work with SkyDrive™ more efficient;
- If you are tired of the inconvenient and complex web interface for Microsoft Live SkyDrive™.
- If you want to assign a drive letter to your SkyDrive™ folders;
- If you want to work with your cloud storage files quickly;
- If you want the data on your SkyDrive™ account to always be at your fingertips.
Then you surely need SDExplorer!
Website: http://www.cloudstorageexplorer.com/