all scams, please refer to

https://www.youtube.com/watch?v=SCrk6wnHS9M
and
https://www.youtube.com/watch?v=Zv-EEGcKqWQ

most likely you will get the 2nd one

basically, they put a pendrive inside that says it's 2TB, which it is not
in reality it's like 8 to 64GB so that during the first month or so you won't notice
once the return/refund time runs out and you continue to store more, you will eventually run out of the fake storage

at that point, the device just starts discarding data saved to it and your files will appear to be corrupted

it's a scam, do not buy

Sometimes it's just the sellers themselves doing that

I've seen some listings in the process of being set up

they set the price to 10 cents, make their own accounts buy a lot
eg, 200 of them
buy multiple times from multiple accounts

leave 5 star review with text/pics stolen from REAL listings

done

you now have a 5 star 1k sold listing

set price to intended price

start scamming

as soon as the reports start/ people start leaving 1 star reviews
delete listing

create new one and repeat until account banned

which after that, create a new account and repeat once more