Go to Resources.
Select the Resources tool from the Tool Menu of your site.
Click Actions, then Upload Files.
To the right of the folder to which you want to add files, click the Actions dropdown menu and select Upload Files.
If you have not created any folders yet, use the site's root folder (bearing the name of the site) to add files.
Drag and drop files from your computer.
Drag files from your computer and drop them in box Drop files to upload, or click here to browse.
This will display thumbnails of the files that will be uploaded.
Or, browse your computer for files.
Click the Drop files to upload, or click here to browse button.
This will open your computer's File Upload window where you can browse for and select the file.
This uploads the files.
View files in Resources.
The files are now located inside the selected Resources folder.