Once Ejected Drive Will Not Spin Down

[mike27oct]

This could be your solution like it was for this person.

WD My Book 4TB powers on as soon as laptop turns off

The scenario occurs two ways. Drive is turned off after being idle, and then the computer sleeps - immediately the drive will turn on. Drive is on and computer is turned off - the drive will turn off and immediately back on again. The drive should be off when the computer is off. This has been happening for a couple of days now and I haven’t changed any settings recently. Is there a file that records this behavior? How do I fix this? Thanks in advance.