Use "Get link", then use "People with existing access" to get the direct link to the file. Then, the url will be direct path to https://org.sharepoint.com/personal/user_org/folder/filename.ext?d=oiuqjaweorihjlkj Now, just remove everything after the ? and put in download=1 and magic happens. https://org.sharepoint.com/personal/user_org/folder/filename.ext?download=1
This works fine with files in Glow OneDrive even for publicly shared files.
I’ve started to use it on my class blog to share files. Here is a simple example. A PowerPoint on my onedrive, publicly shared, the first link is the standard share link, the second has the download parameter.