In order to focus on improving the core functionality of Google Groups -- mailing lists and forum discussions -- we have decided to stop supporting the pages and files features. Even though we know discontinuing these features may inconvenience some of you in the short term, we believe that this move will improve your experience storing and sharing files as other products, such as Google Docs and Google Sites, are designed specifically for file storage and page creation.
For example, you can create your pages on Google Sites and share the site with the members of your group. You can also store your files on the site by attaching files to pages on the site. If you’re just looking for a place to upload files so that your group members can download them, we suggest you try using Google Docs. You can upload files and share access with either a group or an individual, assigning either edit or download only access to the files.
Starting in November 2010, Groups will no longer allow the creation or editing of files and pages; the content will only be available for viewing, and only existing files will be able to be downloaded. If you would like to keep the content currently on the pages and files sections of your group, we highly encourage you to export and migrate it to another product. In February 2011, we will turn off the pages and files features, and you will no longer be able to access that content.