I have a internal ssd, external doesn’t work to run your games on it, so i wouldn’t recommend it. I bought the Samsung 980 PRO 2TB with an extra heatsink, the heatsink is so cheap im comparison to the ssd so i would say better be safe and buy a heatsink, it’s also noted as required from sony. I wouldn’t buy any official lisenced ssd, they all overpriced. I think pushsquare has many guides about ssd’s, maybe worth a look.
Well… That’s true, but wouldn’t solve enough for me, because i easily fill my storage with ps5 games. And ps4 games load a bit faster on a ssd