You're probably wondering what this device is really for. Dutch journalists from LetsGoDigital report that Sony has registered a new cartridge patent with a description at the Brazilian National Institute of Industrial Property: "Configuration used in data saving and storage devices. It could potentially be used in PlayStation as a removable SSD. The PS5 development kit was also registered with the same patent office some time ago.
The designer of the product is Yujin Morisawa, who has been working with Sony for over 15 years and currently is the company's Senior Artistic Director. He is responsible for all PlayStation-related products, which makes it even more likely that the upcoming console may use interchangeable cartridges.
This is the presentation of a patent application filed in Brazil with an illustration showing the appearance of the product:
Sony has already used cartridges in its devices. We remember how Sony used them for PS Vita games, but their production ended in the first quarter of 2019. So maybe the presented patent will not be used in the upcoming fast-approaching PS5 and is a prelude to the creation of a new handheld - PS Vita 2.
So far we can only make assumptions, and every theory will attract its followers. As soon as we learn more about this mysterious device, we will let you know.