This new 40TB hard drive from Seagate is just the beginning—50TB is coming fast!
(www.techradar.com)
My manager ordered four "4TB" external SSDs from AliExpress a few weeks back. He paid £60 total for them, delivered.
My Sus alarm started clanging, so I grabbed one off him and ran some tests on it.
After a couple of days of the tests chuntering along, I ended up reasonably convinced that they're - at most - 40GB. And even at that capacity they're useless, transferring at around 10MB/s