Restore Pictures

I recently pulled my pictures from my external harddrive (Western Digital My Book Home edition) and now I can't view them on my computer's hard drive. I see the appropriate folders, but when you drill into them, the folders show that they're empty. But when you do a properties check, the folders show that they are storing something. How do I view the pictures hidden within the folders? By the way, I already tried the hidden files option. It didn't work.