You can delete a folder within a volume mount point by bypassing the Windows Recycle Bin.
When you use the Windows Explorer to delete a folder that you have created under a volume mount point, you might receive an error message similar to the following, where Foldername is the name of the folder you want to delete:
Cannot delete Foldername: Access Denied. The source file may be in use.
This happens because the Windows Recycle Bin does not understand volume mount points and tries to delete the drive on which the mount point resides rather than the folder on the mount point.
For more information about deleting folders within volume mount points, see Microsoft article 243514.