About Raspberry Pi 4 (with 8 GB RAM and 2 TB USB SSD storage), what I can say is that for the initial download it is not enough. I am going through this as I write. I was doing it with a Pi 4, it went well until around 2022, then it became super slow. Now I am finishing the download on a very powerful PC and it is going quite fast, it should finish tomorrow probably. Once it finishes I will try to run the node on the Pi 4 and see how it goes.