There was a day in BV where the iPad would not work inherently with the iPad to view and edit the users working files (Word, Excel and PowerPoint). Well, that day is gone! If you have your working files in OneDrive, then you can also work with them on an iPad (and other devices, but that is a different post)!
If you still have your working files on the HDrive, what are you waiting for. Move them to the cloud! Directions