No single mod or file named exactly like that exists — but the intent is clear:

Addresses specific crashes related to "out of memory" errors when the game attempts to read large chunks of the original bigfile. How to Install: Navigate to your game installation folder (usually Steam/steamapps/common/Tomb Raider ) and move your original bigfile.001 to a safe location. Copy the new bigfile.001.tiger into the main directory.

If you are seeing a bigfile.001.tiger error, your game is likely struggling to read its own data. Here is how players typically make the game run "better":

It was better.

Ensure the file size remains consistent to prevent the game from failing to launch. Common Troubleshooting Delete bigfile001.tiger and verify files on Steam. Low FPS in Hub Areas Reduce "Tessellation" and "Shadow Quality." Visual Artifacts Update your GPU drivers and disable "Depth of Field."