Ensure ls202130.part1.rar , ls202130.part2.rar (and any further parts, e.g., .part3.rar ) are stored together in the same directory.

If any part is missing or corrupted, the extraction will fail.

Use archival software like WinRAR or 7-Zip to right-click only ls202130.part1.rar and select "Extract Here" or "Extract to [Folder Name]".