Hmm, strange…
It’s possible that since the drive is called D:/, it may think that is just a standard HDD, since the default names for these are C:/ and D:/. It’s a theory at least… :D
Let’s put theory to practice: could you try renaming your drive to another letter? If you’re using windows, you can find instructions here which should work.
(I would provide a more in-depth instruction, but I use Raspbian as my normal desktop OS)