Large games like Fallout 4 (which can exceed 30–50 GB with all DLCs) are often split into smaller "parts" for easier uploading and downloading.
Many mods require a version of F4SE that matches your game version exactly. If your game is v1.10.50, you must ensure you have the legacy F4SE version designed for that build, or many advanced mods will fail to launch. Fallout.4.v1.10.50.0.Hotfix.Inclu.ALL.DLC.part4...
"Part 4" is functionally useless on its own. To extract the game, you must have all preceding and succeeding parts (Part 1, Part 2, Part 3, etc.) in the same folder. Large games like Fallout 4 (which can exceed
When you "Extract" Part 1, the archiving software (like WinRAR or 7-Zip) automatically looks for "Part 4" to continue pulling the data until the full game directory is rebuilt. A Note on Compatibility "Part 4" is functionally useless on its own