This happens if you try to extract part 2 or 3 first. You must start with part1.rar .
A .part1.rar file indicates that you are dealing with a , where a large file or folder has been split into smaller, more manageable pieces (e.g., doc15.part1.rar , doc15.part2.rar , etc.). How to Extract Multi-Part RAR Files doc15.part1.rar
You only need to right-click doc15.part1.rar to begin the extraction process. Use Proper Software: Windows: Use software like WinRAR or 7-Zip . Linux: Use unrar . Steam Deck: PeaZip is recommended. This happens if you try to extract part 2 or 3 first