To repair corrupt CR3 files, follow the given steps:
Copy/ transfer the corrupt CR3 files to the computer.
Download, install, and launch Stellar Repair for Photo on your computer.
Click ‘Add File’ to insert the corrupt CR3 photos.
Click ‘Repair’ to start repairing the selected file(s).
Once the repairing process completes, preview the repaired photos and click ‘Save Repaired File.’
You can save the repaired CR3 files at the desired location.