Fun fact: lots of those sd cards are actually fake. Have you tried actually putting 128gb of data on it?

It's pretty easy for them to put a scummy firmware on it that reports having a significantly larger size than they actually have.

Anything that's easy to fake like that I wouldn't risk personally. All they have to do is put the wrong sticker on it. It's not hard to make a forgery.

Then you're stuck trying to deal with the Chinese company to get your money back. I'd much rather just go to a box store and pick one up, at least I know what I'm getting, and I know that if it turns out not to be the real product I'll have no issue returning it.