Backblaze's data shows that the number of errors is largely related to the age of the drive. Because the older drives are from before Hitachi was acquired by W

Backblaze's data shows that the number of errors is largely related to the age of the drive. Because the older drives are from before Hitachi was acquired by WD, it is going to take a few more years for the brands to equalize if they do combine the manufacturing of both lines.