I think it it will be a dedicated nand flash drive that attach to the motherboard and only using small amount of size (32 - 64 ) . So it wont affect main HDD. And they will probably still using normal HDD to store the game.
It's over, this is from eurogamer:
"We had heard a while back that PlayStation 5 was developed around a state-of-the-art solid-state storage solution (1TB of capacity was the rumour)"
6x master league achiever in starcraft2
Beaten Sigrun on God of war mode
Beaten DOOM ultra-nightmare with NO endless ammo-rune, 2x super shotgun and no decoys on ps4 pro.
1-0 against Grubby in Wc3 frozen throne ladder!!