4K and SSD technology included in next-gen systems will limit users to acquire cheap options to extend their storage in PS5 and Series X|S. Speaking of which, PS5 could have a very discrete amount of usable GB.

Someone that has access to the system has published the usable storage of PS5: 664 GB. Series X will have 802 GB of usable storage and PS5, 664 GB.

KOwbz95 [Rumor] PlayStation 5 usable storage is 664 GB, Astro’s Playroom size is 2,4 GB | VGLeaks 2.0

Moreover, Astro’s Playroom, the game preinstalled in all PS5, could need 2,4 GB.

Take this with precaution, is a rumor.

Thanks, Resetera.