Endless Fluff
Banned
But we've already seen pictures of the rear and there is no slot.They have not allowed photos of the rear of the console so I suspect the expansion port is in the rear like other ps consoles

I don't expect there to be a slot for easy access anyways. The reason for why the Series X/S can do it with an expansion slot is the heatsink/casing of the SSD. With PS5 you use regular off the shelf SSDs without heatsink... you can't just shove this in a slot somewhere. Well you could, but looking at the Samsung 980 Pro and the temps it reaches which peak at around 80°C... yeah, this totally won't lead to thermal throttling if it's not cooled in some way.
I expect the console to have an easily accessible slot inside the console that guarantees the SSD gets good airflow, so a heatsink isn't necessary. Maybe that slot is big enough for SSDs with low profile heatsinks, which would be even better.
Maybe you have to unscrew the "nuts" this thread is about to access the internals. Hopefully it's all easy enough to get done... and this uncertainty is why Sony should finally do a teardown. I really want to know how they've handled this.