You can add Dropbox in Word and Excel for iPad to save files. Learn how to store or save Microsoft Office files to Dropbox on iPad.

That way you can access your files on the iPad. To save files to the iPad you can then sign up for a DropDAV account. The cost is 30% of whatever you are paying for DropBox.

You can get the Microsoft Word app on your iPad through the App Store to create documents, view recent files, and share projects.