It’s a fake / scam. Amazon has lots of those. The drive is much smaller but is programmed to falsely report it’s big. And also lie when it fills up. So it continues accepting written data from the OS and just throws it away.
Since lots of drives are bought for backups that are never read from, folks can be backing up to nowhere for years before they notice.
By which time the scammer has long since closed a dozen generations of Amazon stores, each with generic Chingrish names.
Amazon could stop this cold. But they’re now too big to care.
The old aphorism, “If it is too good to be true it probably is.” applies here. The OP had a sense of that and asked here. Pay attention to that. This is almost certainly a scam.
It’s worth pointing out it’s 3 years old. Which means a) there have been some tech and price changes since then. And b) this problem is not new and Amazon is still ignoring it. And ignoring many other similar problems for other kinds of products.
Ok, I think there’s a bit of “who’s on first” going on.
“Portable” is a subjective term. The actual issue is the linked hard drive is not a solid state drive (SSD) - it’s got magnetic platters.
There are ‘portable’ 16TB magnetic drives for under $1000 (but still several hundred dollars), for a given value of ‘portable’. There are, to my knowledge, no portable 16TB SSDs in the sub-$1k price range. There are no commercially available sub-$100 16TB drives of either type that are not scams.
You think that’s a bargain? I just had a pop up ad on YouTube for a 32TB hard drive that fits in my pocket for less than the price of a beer.
But there were only 100 left.
Also, when I clicked on the link, the first warning I got was that it wasn’t a secure connection. Too bad, for “less than the price of a beer” I might have ordered it and taken it apart just to see what was inside.