Document Library - Adding Files
Desktop client
Click on the “Document Library” icon
Right click on the destination folder and choose “Upload file(s) to folder…”
orDrag and drop files from Windows Explorer to the folder
If the folder you want to add to doesn’t exist:
Right-click on the parent folder and choose “Add Sub Folder…”
If you want to add a new top-level folder then right-click in a blank area of the document library and choose “Add Root Folder…”
Enter the new folder name