Never fall for too good to be true scams. These are very common. With drives or even memory cards that advertise huge sizes, but in reality are more like 32MB memory card or maybe bit bigger USB drive, i n both cases factory QA rejects that didn't meet the standard with hacked controller to show bigger size. And once they run out of space just keep overwriting existing space. So they make them really cheap. Also they can potentially come with malware.
Also similarly common is graphic card scam, where you get what is supposed to be newest card for cheap, but is actually old card with hacked VBIOS, so it shows a newer. Like GTX960 showing as whatever card.
Also similar is true gor fake phones. Doesn't matter which spec it shows, reality can be completely different. On those people even found hidden app that allows you to set basically any spec and it will show in Android. Be it SOC, memory, screen resolution,... you would think it would break something, but nope, it can be edited to show wrong value. Also they always have 1 real and few fake cameras.