I worked out roughly how many drives would go across the length of it which is 3, then I looked to see what the length a disc is and multiplied it. That does give an accurate length of it.
---------- Post added at 20:23 ---------- Previous post was at 20:22 ----------
Here it says it's an expansion
https://www.ign.com/articles/ps5-spi...ion-not-sequel
---------- Post added at 20:24 ---------- Previous post was at 20:23 ----------
OK they've expanded on it now, earlier it just said it was an expansion.