@p 700 MB of data on a PSX disk, and it was overwhelmingly FMV.

To his credit, Uematsu used the PSX's on-board sound coupled with short instrument samples that he then cobbled together to make the music. (And he turned half of them ear-worms to boot, the Maestro indeed). The game's music is a very small portion of the data. Even one-winged-angel used this technique.