Seagate's do see a lot of failures but there are so many that this issue happens all the time. Drives take a dive just when you least expect it.
Did you try wiping the drive clean and starting fresh?
I have a mid 2011 MacBook air that I recently updated to High Sierra. I am having an issue with Time Machine backing up to an external drive. After approximately one gigabyte of back up it fails. I get a message stating an error occurred while copying files.
I have tried using disk utility to repair the disk and have also tried erasing and reformatting the external drive. Have done these several times with no luck.
The external drive is a Seagate goflex. It worked with no problems prior to the update. Any suggestions?