You can create a link directly to a file within your file storage (such as a PDF, spreadsheet, Word document, etc.) which will allow visitors to download this from your site.
Step 1 - Highlight Link Text and access the Link Helper
Highlight the text you'd like to link to a file.
Click the Create/Modify Link button (this icon looks like a chain link).
Step 2 - Upload a New File
In the Create Link window click to upload a file.
Click the Browse and select the file you wish to upload. Once selected, click Upload File.
Note: Do you need to embed a file? Check out this guide for embedding files directly into your site pages using Google Docs Viewer.