You can choose to extract just the base game, only a specific update/patch, or the DLC separately.

Plug your exFAT-formatted USB drive into your PC and copy the Easy PKG Extractor .pkg file to the root directory.

Easy PKG Extractor is a homebrew application that lets you "dump" or copy installed package files (PKGs) from your PS4's internal storage directly to an external USB drive. While advanced users often use FTP or tools like PS4-Xplorer, this app is aimed at less experienced users who want a "one-click" experience with a graphical interface.

The primary benefit is . If you delete a game to make space, you can reinstall it later from your backup without needing to find the original source or redownload it. Additionally, it provides a safe way to preserve your digital library and any patches or DLC you have acquired. How to Install PKG Files - ConsoleMods Wiki