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It's sometimes convenient to have a drive letter to mimic the development and production servers on my local machine on Windows.
subst [Drive] [Path]
And an example of mapping a D: drive from a folder called "D_Drive" on the C: drive is:
subst D: C:\D_Drive
I use this feature all the time, and my work machine forgets this drive letter mapping whenever it reboots. It's possible to map this drive automatically at start via the registry, if needed.