It checks if any of the RAR parts are corrupted or missing.
You don't have to re-download the entire archive, only the missing small pieces. Par.rar
The application scans the downloaded directory to find .par2 files. It checks if any of the RAR parts are corrupted or missing
If damage is found, it uses the PAR2 files to regenerate only the specific missing pieces. part1.rar to part10.rar )
When downloading a file split into multiple parts (e.g., part1.rar to part10.rar ), a single missing byte can ruin the entire archive. PAR2 files contain "parity data" that acts as a mathematical backup.