Before we begin please note that you can not make uploaded files (pdf, word docs, images, etc) private, ever.
Even if you place an uploaded file on a "private" page the file itself is not private.
If you upload any file to the site it will be viewable by the public and may be found by search engines such as google. Never upload any confidential file to the website.
Click "edit" on the page you want to add a file to. Once on the edit screen, click the "Files" tab in the left navigation.
In the Files tab click "Choose File" or "Browse" (the language changes between Mac and Windows). Locate the file on your computer, click "Open" and then click the "Upload" button.
Your file should now display in the list of files, which is directly above the "Add a new file" field.
Step 3 - keep display checked
If you keep the display checkbox checked the link to the file will display at the bottom of your Salli page. If you wish, you can add a friendly description to your files (this will display the entered description rather than the file name uploaded).
If you opt to display your files and you want to change the order they display in, make your way back to the "Files and Video" tab of the edit screen. Once there, use the quad-arrow cross to the left of the file name to drag and drop the files into a new order. Click the "Save" button, and you should see your files displayed in the proper order at the bottom of your page/content.
Step 4 - uncheck display
If you want to determine where the file link goes on your page, rather than have it automatically displayed at the bottom of your page, then uncheck the display box.
Next you'll need to grab the web address of the file you just uploaded.
Do this by right clicking on the file name and opening it into a new tab (pictured below). Go to that tab and copy the web address. Then create a link with the address of the file. This is just like creating any other text link on the site. Highlight the words you want to link the uploaded file to and click the chain icon. A popup box will appear. Paste in the copied url into the link field. Click insert to close the pop up.
Click save as draft or publish and sit back and admire your work, you file-adding maven.