When AutoSave is enabled, Word will save a document to the cloud right away. The name of that document will be based on the date. You can then change that file name or the location where the file is ...

If you prefer local storage, don't worry: you can get back the traditional way of creating documents, in which they're not saved to the cloud until you choose. In Word for Windows, click File > More > ...

Microsoft has announced that Word for Windows will now save new files to OneDrive or preferred cloud storage automatically.