I have a laptop and a desktop computer. I also have a Toshiba external hard drive. When I plug it into the desktop, the drive works perfectly. When I plug it into any of the ports on my laptop, it doesn't show up at all; not even in Disk Management. I have two other external hard drives that work just fine in those ports.
So how do I determine why the drive isn't working and then how do I fix it?
Does this external drive work in the laptop if you remove all the other external drives from the laptop first? There's a known issue with WD external drives and Windows 7, where drives of the same kind have the same signature and you will only see one at a time.