Unable to implement a shared folder

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VirtualBox 6.1.

I've been unable to use a shared folder.

Both host and guest are Windows 10 (I also have a Ubuntu VM, but that's not relevant).

Under Shared Folders, I have the following Machine Folder:

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* Folder Path: A folder on the HOST computer. Say, "C:\Foo".

* Folder Name: "Win10_64_001_Share"
I presume that this will just be the name that I see on the guest VM.

* Mount Point: I specified an existing folder on the GUEST machine, "C:\_Shared".
I also tried "C:/Shared".

I have auto-mount and “make permanent” checked.

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I expected that, on the GUEST machine, in "C:\_Shared", I would find sub-folder "Win10_64_001_Share".

However, "C:\_Shared" is empty.

I've powered-down, and restarted the VM, to no avail.

Though auto-mount is specified, I would try a manual mount.
However, I'm not sure what that command would look like, for this situation.

Keep in mind that both host and guest are Windows 10.

Thanks in advance.

[scottgus1]

Guest Additions must be installed in the VM OS for Virtualbox Shared Folders to work.

If you think they're already installed, please provide a VM log:

Start the VM from full normal shutdown, not save-state. Run until you see the problem happen, then shut down the VM from within the VM's OS if possible. If not possible, close the Virtualbox window for the VM with the Power Off option set.

Right-click the VM in the main Virtualbox window's VM list, choose Show Log. Save the far left tab's log, zip it, and post the zip file, using the forum's Upload Attachment tab.

[Banner]

Guest Additions must be installed in the VM OS for Virtualbox Shared Folders to work.

If you think they're already installed, please provide a VM log:

Start the VM from full normal shutdown, not save-state. Run until you see the problem happen, then shut down the VM from within the VM's OS if possible. If not possible, close the Virtualbox window for the VM with the Power Off option set.

Right-click the VM in the main Virtualbox window's VM list, choose Show Log. Save the far left tab's log, zip it, and post the zip file, using the forum's Upload Attachment tab.

Thank you very much.

I was unable to install Guest Additions (for either my Windows or Linux VM's), via the GUI.
However, I was able to install for both of them via command line.

I made a post, describing how (which I suspect nearly everyone already knows, for Linux).

viewtopic.php?f=6&t=104811