You can assign a mount point folder path to a drive to have the drive appear as a normal folder located where you want.
With you mount an internal or external drive to an empty folder, you will be able to access the contents of the drive from the folder path. The contents of the drive will still physically be located on the drive. Anything you save into this folder will actually be saved to the drive.
You can mount a drive with or without a drive letter to an empty folder.
This tutorial will show you how to assign a mount point folder path to a drive to link the folder and drive in Windows 10.