Having two SD card with the images on in both my K-1 and K-3 there's a backup already should something go wrong. I think one knows whether they can trust their system to cut and paste without problem.
As to a MOVE command, not all operating systems include that.

Reminds me when I had a fully formed small tortoiseshell butterfly in between the car speedometer and its covering glass. Took me a while to dismantle it all to release it. As to how an ant got passed the weather seals I suspect it got into a lens you weren't using and moved across later when you used the lens but wasn't looking!
If a camera has genuinely failed due to a manufacturing fault then it certainly should be fixed or replaced (within a reasonable period of time.) If its failed by heavy use in challenging conditions it isn't so clear cut. Similar to buying a new car and entering it in the Dakar rally and taking it back to the dealer afterwards complaining its worn out. Maybe you need to budget for a new camera annually or get it insured (if anyone would bear the risk?) I mentioned it earlier, have you tried claiming on your home insurance? (Something like this: https://www.hiscox.co.uk/home-insurance/contents-insurance/camera-insurance )

No I don't remember! I don't take notice of any adverts, never have.
As to adverts, they've always been faked. In black & white TV days they used yellow clothing to look bright and shiny as white clothing looked dull. That was to show their powder was whiter than white!
Food ads are faked, I don't trust any of them. In fact I normally go out of my way not to buy anything I've knowingly seen advertised, one always feels let down by reality!
As to that Pentax ad (I didn't know they'd been any for donkeys years as the lack of them is what users complain about here!) It's quite likely a new camera straight from the factory might have fine WR seals still. Give it 18 months use and time takes its toll. If they'd had a take where the camera seals failed, do you believe they'd have shown it?
In any event, a large waterfall with cold water in a hot humid climate is something else entirely. Its the condensation that occurs both inside and outside the camera making it wet (same as when one wears a plastic raincoat on a warm wet humid day, the inside gets soaked but it won't have leaked.)
Best advice, ignore too good to be true claims in adverts!
Plenty of big names featured here: https://www.asa.org.uk/codes-and-rulings/rulings.html names you'd think you could trust.

Air already in a camera can change its form due to temperature changes. It's to do with the Dew Point Temperature causing condensation to occur.
This explains how it happens.

And for the basics: https://www.makeuseof.com/tag/6-mistakes-will-ruin-dslr-avoid/

It isn't really just about being weather-proof or waterproof, how you you differentiate these conditions? If water's pouring onto you and your camera from a waterfall or out of the sky, are you repelling weather or water?

Did you appreciate you were replying to a spam post added to a four year old thread? it wasn't even relevant to the previous posts!

PS I cannot detect the reported green cast. Maybe the issue was their monitor

But cars and windows do leak. They have opening device to gain entry or let the air in. Have you not seen the reports of cars, homes and shops after flooding? Non are waterproof, if they were they'd be no air replacement and anyone in them would suffocate without a dedicated life support system like the space station! We're talking consumer cameras here, not life support equipment.
If someone wants a waterproof (as opposed to weatherproof) camera, they should buy one sold for the purpose.
Notwithstanding, it might be worth checking to see if the camera is covered under the home insurance policy, and if not this time, specifically include it in the future. Or you just take the risk personally.

https://www.switchbacktravel.com/weather-sealed-dslr-cameras-list

Something like this might help in adverse conditions as it's designed to be waterproof. DSLRs certainly aren't.
Or speak to these people.

I'm not sure those Youtube videos of people holding their camera under a running tap are being particularly helpful and anyone relying on an unprotected camera to be waterproof is being somewhat naive.

Sorry you've had problems with it. It does seem that WR has worked for some when testing it though:
https://www.youtube.com/watch?v=p0nFu3dm-Gc
Pentax cameras aren't designated as fully waterproof so the older they are the more susceptible they're going to be to water ingress, though in this case it sounds to be more the humidity of the air was the issue.
It's the same with so called waterproof watches, open them to change the battery and they'll likely not be waterproof any more.
If you used the zoom the 16-85mm does not zoom internally so that humid air and even water can be sucked into the camera.
Did the camera still have the flash socket cover in situ? They often go missing accidentally or on purpose and might prove an entry point for moisture along with worn battery and SD card flap seals, and then there's the hdmi cover so it's hard to say why it failed you.
Yes you're right to suggest not to trust it! Notwithstanding, hope you got some great photos regardless.

Thanks. Having come from the era of silver bodies (ME, MX, KII etc.) that's not something I'd have ever considered. Basically street cred then !

I take the card from the camera and put it in the PCs inbuilt card reader. I then cut the files from it and paste them into my PC photo archive. That leaves the card empty.
IMHO I'm not sure its a good idea to continually reformat an SD card. Flash based media has a limit on the number of writes so reformatting every time is going to cause more wear to the card than necessary and get you to that limit a bit quicker.
Clearly if any corruption to a card has occurred its worth trying a reformat to fix it and use an intelligent SD card formatter to do that as all the camera format is likely to do is rewrite the block allocation map. It all happens too fast for it to have been a proper reformat so card errors won't be cleared. If anyone believes otherwise I'd be interested to hear their reason.

Can I ask what you didn't like about the KP to move it on again so soon?