If you are reading this, you have likely encountered this red text in your terminal, forensic tool (like FTK Imager, Autopsy, or X-Ways), or backup software. This article will dissect exactly what this error means, why it occurs, and—most importantly—how to fix it.
The most common cause for this error is a corrupted or missing file. Instead of reinstalling the entire game, let your launcher find the missing pieces. Open your Library . Right-click on the game (e.g., Rise of the Tomb Raider ). Select Properties > Installed Files . Click Verify integrity of game files . Unable To Open Bigfile Bigfile.000
Identify the format first. Open bigfile.000 in a hex editor. Look for magic bytes: If you are reading this, you have likely
As a final attempt, try renaming the file to a generic extension (e.g., .dat or .bin ) and open with a text editor or media player. This rarely works but may reveal plain text or common headers. Instead of reinstalling the entire game, let your