File System Library

Engine Version: 4.23,4.25 - 5.6Asset Version: 1.0

front page File System Library

By Karl

27/07/2025

Struggling to manage files, create save/load systems, or let players interact with their computer’s file system from within your game? The File System Library is the powerful, cross-platform blueprint library that solves this problem, giving you complete control over files and directories without writing a single line of C++.

This plugin is designed to be incredibly easy to use and works flawlessly both in the editor and in all packaged builds (Development, Debug, and Shipping).

Core Features & Benefits

Native Open/Save File Dialogs:
Provide a professional, seamless user experience by using your operating system’s default dialog windows. Prompt the user to select a file to load or a location to save, directly from any blueprint class.
Complete File & Folder Operations:
Get full control to create robust systems. Easily copy, move, delete, and rename any file or directory on the user’s computer. This is perfect for managing save games, user-generated content, or configuration files.
Powerful String I/O:
Easily save player progress, settings, or create log files on the fly. This feature allows you to load text from any file into a string and create new text files from a string, simplifying data handling.

Why Choose File System Library?

100% Blueprint Accessible: No C++ knowledge required.
Works Everywhere: Fully tested and functional in both the editor and final packaged games.
Cross-Platform: Designed to work seamlessly on Windows and Mac.

Technical Summary

Open/Save File Dialog: Prompt the user to save or select a file.
File Operations: Copy, move, delete, and rename files.
Folder Operations: Copy, move, delete, and rename directories.
File String I/O: Load from and create files with string data.

Platform Specific Notes

macOS (Tested on Big Sur 11.7):
If you encounter packaging issues on a Mac, please move the plugin from the engine’s Marketplace folder (/Users/Shared/Epic Games/UE_4.XX/Engine/Plugins/Marketplace/FileSystemLibrary) to your project’s local Plugins folder ([Your Project Name]/Plugins/FileSystemLibrary). This is a common requirement for code-based plugins on macOS to package correctly.