皮埃尔，

此行为是设计使然.您无法使用网络浏览器将文件夹拖到文档库中.如果您尝试将文件夹拖到文档库中，则会收到错误消息.

要解决此问题，请使用使用资源管理器打开功能.或在文档库中创建文件夹，然后将文档拖放到该文件夹​​中.

This behavior is by design. You can’t drag folders into document libraries by using a web browser. If you try to drag a folder into a document library, you’ll receive an error message. 

To work around this behavior, use the Open with Explorer feature. Or create the folder in document library and then drag and drop the documents to the folder. 

参考:

https://support .microsoft.com/en-sg/help/2796734/information-about-dragging-files-into-document-libraries-in-sharepoint

http: //www.urtech.ca/2015/05/solved-folders-and-invalid-files-can-dragd-to-upload-on-onedrive/

***的问候，

Lisa Chen

Lisa Chen