Icon folder

I changing icon folder in WD my book .
but when I eject WD my book and I connect it to my computer next day.
It’s become default window folder by it self.

so I want to change icon of my folder but I can’t why and How?
I really need to change it.

Modern USB WD My Book hard drives do not normally show with a custom icon. Would you happen to have a device from this particular product family?