Was seen at Walmart.
It now looks like any external SSD, which probably runs over USB 3.0 / 3.1.
Personally, I would prefer to build an internal memory with enough space instead of messing around with an external solution. I have a fast line anyway and don't really need a lot of space.
For someone who wants to save a lot of games permanently, an additional 500GB is not the world now. Before handling 2-3 things like that, I would recommend waiting. 😅
In addition, there are certainly better alternatives.