> Mountain Duck is an app that can present OneDrive and Sharepoint
> drives as Windows drive letters.
>
> I found this discussion from a few years ago:
> http://www.ztw3.com/forum/forum_entry.php?id=123067
>
> We're using the OneDrive app to make users OneDrive available to them
> in File Explorer. A lot of users have hit the Sync button in Sharepoint
> to also make some of their Sharepoint team folders available in File
> Explorer via the OneDrive app.
>
> This is working ok except where they have a lot of files, usually in
> large Sharepoint drives. If they try to sync too many files, their
> computer spends all its time syncing, even if there are very few files
> being changed.
>
> I'm wondering if using Mountain Duck instead of the OneDrive app would
> work better. Is anyone here using it, in particular with hundreds of
> thousands of files?

I have Mountain Duck and use it occasionally for OneDrive and SharePoint, but I've found that the latest version of WebDrive is even better; seamless and transparent. Here's what WebDrive maps to drive letters as my default at startup:

Drive B - Corporate Box
Drive O - Personal OneDrive
Drive S - Corporate SharePoint
Drive X - Corporate SharePoint
Drive Y - Corporate OneDrive

Needless to say, for me the whole purpose of WebDrive and its drive letter mappings is to enable folder and file access for ZTreeWin. And, it works.