Use WD drive utilities to check for any hard drive issues. Western Digital provides a diagnostic tool the run disk tests on your WD hard disk.If the hard disk works, there might be a problem with your computer. To determine whether the fatal error is caused by your Western Digital hard disk or by your computer, try using your hard disk with a different PC or laptop.Check all connections, including the power cable, as loose cables are a common cause of the fatal error.If the error is caused by an incompatible USB cable, or a malfunctioning USB port, connecting your hard disk using a different cable and USB port may help you get rid of the fatal error.Shut down both your computer and your WD hard disk, then restart and check if the error persists. Sometimes, a simple restart will fix the problem.These basic troubleshooting steps can resolve the issue in most cases. However, the fatal error message can also be triggered by other reasons, such as a loose connection, corrupted files, or outdated firmware. In some cases, the error indicates that your hard disk is seriously damaged and needs to be replaced. Fatal errors are a common problem among Western Digital hard disk users.