Select 'Libraries' from the 'Tools' menu in the site editing toolbar to access the WMS libraries area.
Choose where you would like the new file to be stored by clicking once on a library folder in the left-hand 'Libraries' pane.
Note: The selected library folder should now appear highlighted in yellow.
Search your computer for the file you would like to upload by clicking once on the button labelled 'Browse' in the box entitled 'Actions' at the bottom of the screen, below the 'Libraries' and 'Files' panes.
Note: Clicking on the 'Browse' button prompts your computer operating system to open up the pop-up window which allows you to navigate to the folder on your computer where the file you want to upload into the library is stored.
Locate and double click on the file to close the pop-up window and the file path will now appear in the field beside the 'Browse' button in the 'Actions' box.
Click once on the button labelled 'Upload This' (next to the 'Browse' button) to upload the file into the selected library folder.