How to Fix the "Unable to Open Bigfile.000" Error in Shadow of the Tomb Raider

4. Reset the Microsoft Store / Xbox App Scripting (For Game Pass Users)

Shadow of the Tomb Raider offers a breathtaking, high-fidelity experience, but for many PC players, this experience can be abruptly halted by a frustrating error message: .

Interrupted downloads, hard drive sector failures, or sudden PC shutdowns can corrupt large database files.

The "Unable to open bigfile.000" error is almost always a security conflict rather than a broken game. Check your antivirus quarantine first—it usually saves you a 40GB redownload. Happy raiding

Open Windows File Explorer and navigate to your installation directory: C:\Program Files (x86)\Steam\steamapps\common\Shadow of the Tomb Raider . Scroll down to find .

[SOTTR.exe Properties] ➔ [Compatibility Tab] ├── ☑ Run this program as an administrator └── ☑ Disable fullscreen optimizations 4. Migrate Installation to an Alternative Drive

The game must be able to find bigfile.000 and have permission to read it.