Research Drive is based on ownCloud. You can link your Research Drive (ownCloud) instance to your Open Science Framework (OSF) project or component to see files stored there alongside files stored on OSF Storage or other storage providers.
Files added to Research Drive will be accessible via OSF; likewise, files added to Research Drive via OSF will be accessible on your Research Drive instance.
The ownCloud add-on allows you to connect external content to OSF. This connection does not store or back up this content on OSF.
To set up a connection between Research Drive and your Open Science Framework project, you first need to create WebDAV credentials: How to get your WebDAV credentials
After you have created your WebDAV credentials, can you follow these instructions to set up a connection between Research Drive and your Open Science Framework project: https://help.osf.io/hc/en-us/articles/360019929853-Connect-ownCloud-to-a-Project