This recipe works for:
SharePoint 2010 Foundation
SharePoint 2010 Standard Edition
SharePoint 2010 Enterprise Edition
Office 365 (SharePoint Online)
You will need a SharePoint site with a document library where you want to upload your document. This recipe uses a SharePoint 2010 Team Site for illustration.
You will need Office 2010 installed on your client machine.
Select the Shared Documents link in the Quick Launch menu.
Select the Documents tab in the Library Tools ribbon.
Click on the small black triangle at the right of the Upload Document icon.
A drop-down menu is displayed. Click on the Upload Multiple Documents menu option...