Keep in mind that these scam devices rarely present themselves as a functional but lower-capacity version. It's more often the case that the device does presen

Keep in mind that these scam devices rarely present themselves as a functional but lower-capacity version. It's more often the case that the device does present the advertised capacity, but with a massive "black hole" in the middle where any writes are silently discarded. Depending on your filesystem, you don't need to write much data at all before you're likely to hit this "black hole" and start losing data.