Hi seth,
Need to give us more info about your setup. What is your computer setup, how do you normally access your verbatum external HDD, thru a USB connection, a SATA connection a firewire? And exactly what happened. Is this powered by a USB cord or an extenal power block. Did it occur after a power outage?
Also with the HDD connected, go to Disk Management, and see if your external HDD is recognized by the OS, and if so, what are the Drive status parameters, volume status parameters.