I’ve had the same concern with a third party SMART monitoring tool warning me of a potential problem.
I’ve asked WD 4 times what attribute 16 (hex 10) means and each time they have ignored the question and suggested I run DLG or some other suggestion.
From DLG I can see the attribute is described as “Gas Gauge” - whatever that means. But I have concluded it’s perfectly normal and will just carry on using the drive.
