Time Machine error cannot create backup folder

Using EasyStore 8TB, formatted for macOS. First five days of backups were perfect. The computer is an iMac with Sierra. It is set to Never go to sleep. Then, after about five days the Time Machine could not complete a backup. The error message said, “Could not create a backup folder.” If I restart the computer, it works fine UNTIL the next day, when it fails again, with the same error message. I looked through the community forums and saw ten similar posts but zero solutions. This also happened with the MyBook that I had prior to the Easy Store. The WD support had me reformat that drive two different times, erasing all my backups, and then the drive eventually became unreadable. That was within the span of 11 months.

Hi,

You could refer to the following link: How to Check External Drive for Errors or Failure on macOS