But Windows 10 let you move the storage location in a new desired drive.
For changing the default location of the new Documents you will create in future, go to Start- Settings – System – Storage and change the Document drive C to a desired drive.
Windows will automatically create a user folder with document sub folder for keeping your new documents.
Next time you hit Ctrl + S / Save button on MS Word it will automatically locate the new Document folder.
Keep it simple and clean