It turned out that the PlayStation 5 does not support additional SSDs. The slot for them will be activated somehow later
When Sony published a video with the analysis of the PlayStation 5, users learned that the console has a slot for connecting external SSDs. The port is suitable for any NVMe storage device that meets the stated speed standards. But you won’t be able to connect it to the console on the day of its launch. On the PS5 release, the slot will be disabled and will only be activated in the next updates.