Why Ubuntu does not recognize second hard drive when uploading image to Instagram etc

Why Ubuntu does not allow me to select and upload an image to Instagram from the second hard drive on dual boot system? Only workaround I have found is to move the image to Ubuntu image folder on the drive where Ubuntu is installed and then upload it from there. The other hard drive where Windows is installed is otherwise recognized and works, but in this particular function it can't be used to upload images. I tried through the Firefox Instagram extension and through the separate Instagramport app. Same error on both.

Edit: The error message:

"Could not read the contents of.." and "Error opening directory '/media/my**** .. permission denied" ****=name of the drive