Navigate to your game installation folder. Find all files beginning with bigfile . Right-click each one and select Properties . In the General tab, under "Attributes," uncheck the box next to Read-only , then click OK or Apply .
Close the game client completely using the to ensure no stale tasks are active. Navigate to your local game installation directory: Steam: ...\Steam\steamapps\common\Rise of the Tomb Raider\ Epic Games: ...\Epic Games\RiseOfTheTombRaider\ rise of the tomb raider bigfile000 error verified