Sorry to say but I think your memory was hacked.
It looks like your player's true capacity is 2GB not 16GB.
It's normal for these players to want a reformat after swapping the firmware but after that should show the correct amount, in your case 1.8GB.
Other than that does your player work normally? I would ask the seller for a partial refund since you only got a 2GB player when you paid for 16GB
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