Final Fantasy VII is one of the most influential JRPGs of all time. For players using the original PlayStation discs or optical-disc images (ISOs) from European releases, an issue sometimes encountered is a “CHD” (Compressed Hunks of Data) or disc-image mismatch error when attempting to use preserved images with emulation frontends that rely on CHD-format files (for example, RetroArch/Beetle PSX or other emulation setups). This article explains what the CHD issue is, why it happens specifically with European Disc 1 of Final Fantasy VII, and provides a clear, lawful, and practical approach to resolving it.