The keyword includes "PS4 ROM", which is technically a misnomer. PS4 discs are Blu-rays, not ROM cartridges. However, in the emulation community, "ROM" refers to the extracted base game folder or PKG.
For users with a standard, unmodified PS4, applying updates is straightforward: Uncharted 4- A Thief-s End - PS4 ROM PKG UPDATE
Navigate to > Debug Settings > Game > Package Installer . The keyword includes "PS4 ROM", which is technically