To integrate OneDrive and save the files submitted by your users in OneDrive folders is very simple.
Create a page and save it.
From the Settings tab, go to the OneDrive area and click the Enable button. A OneDrive connection will start and it will allow you to select your OneDrive folder.
Once you connect a page, the connection will be available to other Pages. Each page can have it’s own folder in OneDrive to save the files.
The sync is automatic; once a page receives submissions with files, these are automatically synced with your OneDrive account.
Only one OneDrive connection/account is available for all pages.