I am trying to set up a new catalog for my wife's backup HDD and I ran into this problem. (I've done the import 2x already). arrow 2 shows that LR does see the files but says: " no files in the selected folder. arrow 1 shows that they are there. 2 problems; why can't I see them? and the biggest problem for me is how do I move the files down to where arrow 3 is pointing.
My wife does mot believe in keywording and gets very upset when she can't find an image so I'll do it.(gnashing of teeth)
D: is not a folder, but the disk. It should not show as a folder and could well be the reason of the problem. Try the following (always make a catalog backup first); right-click on the D: folder and choose 'Hide This Parent'. Then restart Lightroom.