The clone nowadays are real capacity! But failure rate upon use, that's another story.

Erm.
That's what h2testw does.

It fills it up with dummy data so to see how much actual capacity it has, regardless of what is being reported on the packaging/disk manager.
So you may have a disk reported to have 32GB, but h2testw says it only has 2GB, in which case you've gotten yourself a fake piece.

Agree, if tested with software, or fill in full with file, and can read back all the file, then those card or pendrive is original.
The clone will show the fake capacity when insert into USB or phone, but will fail if you store more thing. Only check with the software like h2testw will show it's true capacity.
Normally those "ship from oversea" card are fake, and those non branded also fake too. Still, there are seller on Lazada that sold true ori card. Just need refer to the review on the product.
Yes, h2testw can verified all these. I mostly use the easy way where I copy bunch of file inside, and copy back from the disk to my computer. If the copy process get stuck somewhere in the middle, then can confirm the disk is fake.

Yes, exactly, you can read my mind?    

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