Fixed, Solved, Error mounting filesystem, external device, Error mounting /dev/sdb1 at /media/name/device name

After a series of power outages at my house I rebooted my Ubuntu machine only to discover that my external drive, a WD My Passport Device, no longer would mount. I tried several fixes found in several forums; none of them worked. This is what finally did work: Disconnect and remove the malfunctioning (unmountable) external device. Launch "Disks" program. (That's what it's called in Ubuntu) Select the disk that fails to mount; in my case "1 TB WD...." Click on the icon that looks like a little gear: "Additional Partition Options." Select "Repair File System." A message will pop up asking you to confirm that this is what you really want to do. As I was at the end of my rope, I hit the "confirm" button. Re-connect (reinsert) your external device to the USB port. In my case, Voila!, my device is now working and all files on my external WD drive once again show up in Files (Nautilus) on my Ubuntu desktop. UPDATE: After the multiple ...