You can use the "Test" feature in WinRAR or 7-Zip to check if part 12 is damaged. If it fails, you will need to re-download that specific part.
The collection features remastered versions of UNCHARTED 4: A Thief’s End and UNCHARTED: The Lost Legacy . Uncharted.Legacy.of.Thieves.Collection.part12.rar
You must have all parts (part1, part2, ..., part12, and any subsequent parts) in the same folder before extraction can begin. You can use the "Test" feature in WinRAR