There are a number of ways that you can add file attachments to a Google Site. For instance, you can add files to the bottom of a page in the attachments area. You can also add a File Cabinet page. However, my favorite, by far, is the Folder gadget.
The folder gadget lets you display the contents of a Google Drive Folder on a Google Site. You add your folder by editing a page and going to Insert > Drive > Folder. Then you select the folder from your Google Drive that you want to add to your Google Site.
For me, the Folder gadget has a number of advantages over page attachments or a file cabinet page. Here are a few of the important differences:
1. Updates: The problem with attachments and file cabinet pages is that every time you update a document, you need to remove the one you had from a Google Site and upload the latest version. If you use Google Docs, Spreadsheets or Presentations, you can log in to your Drive account, and edit the document. Because the file is in a folder that is embedded on your Google Site, the latest version of the file is automatically pushed to your website. This is great for teachers who update a syllabus or other class documents.
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When working on a Google Site, the view you get as the owner, is sometimes going to be different to the view a visitor gets when they access your website. Google has a built-in option called Preview page as a viewer, to deal with just this problem. It shows you exactly what your Google Site will look like to someone who does not have access to your site as an editor.
Best of all, it is very easy to do. Make sure you are signed in to your Google Site, then click More > Preview page as a viewer, (or use the keyboard shortcut g then p). Your site will then open in a new tab, minus the editing bar you normally see across the top of your page. Instead, you will see a small yellow rectangle at the top of the page that says “Preview page as a viewer”. If you have asked Google to optimize your site for Mobile visitors (More > Manage Site > General > Mobile) you will also see the option to switch to a mobile preview, but in my experience, this is often not a pretty sight!
Why would you want to preview a page as a viewer? Well, if you are anything like me, you may occasionally (read: often!) forget whether or not you changed the sharing settings on an embedded Google document. In the editor view on your site, everything looks fine, and it displays just like it should. However, visitors who do not have access to a document see a placeholder denying them the ability to see it without first requesting access. It is an easy problem to fix, but a quick preview of the site as a viewer can help alleviate problems like this before they arise.