Hi there,
probably different people are using the same account from SunFounder_Moderator.
The tihng is that without the extender it is booting perfectly fine. It was actually me in the other thread that suggested the extender wasn’t going deep enough.
That resolved at least I can use the extender as a drive bay, but booting from it doesn’t work. Please check that thread.
So if nothing substantial in the design of the extender has been changed then it will not make sense to send me a new one either. I was able to resolve my actual issue though. And I simply do not use the sd card extender at all.