I half expected the micro-SD cards from A*Express to be fakes.

Yep.

32GB = 16GB
256GB = 4GB

I just had to buy them to find out.

Refund requested.

Oh, and to validate, right after testing these two types, I tested a genuine Sandisk 32GB card and it passed.

I usually buy micro SD card from Amazon and have not had an issue.

It does make me think - is there a trusted store / brand on A*Express - any pointers?

@linker3000 the more logically priced ones tend to be real, the $5 256GBs are usually bunk
@astraleureka Any suggested stores / brands?
@linker3000 just took a look at my order history, last place I ordered from (and got legit cards) is no longer available so no, sorry :(
@linker3000 I think they do this cause they know a lot of people in the USA will put like 1 document on it and basically throw it out right after. and honestly, I suspect for the majority of cases, their right. most of them probably get thrown out without ever being used at all. Society is extremely wasteful.