On the main screen where all the apps are shown click on OneDrive at the top.
One Drive prepares to show you files and displays the following screen.
Click on the arrow.
OneDrive files are displayed on the browser. Click on Sync at the top.
Getting Ready to Sync window appears.
You are prompted to switch apps, click YES.
OneDrive gets ready, click on sign in.
Go through the screens clicking NEXT
On the next screen you are prompted to setup OneDrive using the mobile app, click "Later".
Once your OneDrive is ready you can open your files locally on your PC.
Your files will open and you can start working with them.