If a multi-gigabyte download fails at 90%, it is more efficient to re-download a single small part than the entire file.
Many email clients or cloud storage services have strict per-file size limits. nr.part2.rar
(common when part 1 or 3 is missing) Extracting on different devices (Windows, Mac, or Mobile) Repairing a corrupted .rar part I can provide the exact steps to get your files open. If a multi-gigabyte download fails at 90%, it