It's a hard concept to grasp. It's a digital NFT. It isn't a scam as it is promoted by Trump himself. Go to the link I provided as part of the original post and watch the video on the home page.

As far as block-chain and crypto-currency goes you're going to have to do your research on that, but I assure you it isn't a scam. That isn't to say there isn't risk associated with purchasing an NFT, but this isn't some scam where someone is trying to get rich off of Trump's brand.

edit: forgot to add that the images are embedded in the blockchain itself. That is why you didn't see anything about where the images are hosted. They're apart of the blockchain and are not centrally located anywhere. That's the beauty of blockchain and it's going to liberate man-kind (blockchain that is).