In Word 365, can't pin a folder with subfolders

[Ward_Webber]

In Word 365, I'd like to pin a folder I frequently access. That folder contains mainly subfolders. But when I choose File > Open > Folders, the only folders listed contain only files, not subfolders. How can I add the folder I want to that list, so I can pin it?

[#2]

@Ward_Webber 

Those sub-folder keep online (e.g. OneDrive)? If yes, you may browse by 'folder'