Microsoft SharePoint 2013:

  1. Open the Document Library.
  2. Navigate to Files > Upload document, or Click New Document button.
  3. Browse for a file on your desktop and click OK. .

 

Read the Knowledge Base article on Sharepoint with Exchange upload limit for upload limits.

 

Microsoft SharePoint 2010:

  1. Open the Document Library
  2. Navigate to Library Tools > Documents
  3. Click Upload Document in the New section
  4. Browse for a file on your desktop and click OK.

Microsoft SharePoint 2007:

  1. Open the Document Library
  2. Choose Upload Document from the menu at the top
  3. Browse for a file on your desktop and click OK.