If you subscribe to Office 365 you can create a new Office file in Glasscubes by navigating to the Files section of your workspace.
Click the 'New' button and select the type of file you want to create from the drop down menu.
After you have finished adding content to the file click the title panel and give it a name.
When you've finished click outside of the title panel to save the name and file. You can now close the Office application.