Hello, I dusted my PC and unplugged the USB devices. After I plugged them back in, my WD External Hard Drive did not show on my pc. Since I could clearly see the printer, I switched the printer with the WD External Hard Drive. Now the WD shows up on my pc AND the printer shows, which is now plugged into the USB port that did not show the WD earlier, and the printer works fine. Is that USB port defect or could there be another reason for this? Thank you