: If you are on PC (Steam/Epic), use the Verify Integrity of Game Files option in your library settings to automatically redownload missing or corrupted pieces.

: Some users find that 7-Zip handles multi-part RAR files better or extracts them automatically even if a checksum error is detected. 3. Fixing Game Data Errors on Mobile/PC

If you get a "Checksum error" during extraction, it means the file is technically broken, but some of the data inside may still be usable.