This shouldn't surprise anyone. GTA V was one of the few late life 360/PS3 games to come on multiple discs, 3 discs as I recall, making it one of, if not the largest, 7th gen games. R* games are huge in scope, RDR2 is said to have an even larger map than GTA V. RDR2 runs at one half 4K resolution on PS4 Pro according to digital foundry, 1920 x 2160, so we're most likely looking at bigger texture installs on Pro. Audio will be a large part of it, as I recall R* doesn't like to compress their audio files.
Only the 360 version had multiple disks. 2 of them.
- "If you have the heart of a true winner, you can always get more pissed off than some other asshole."