For20-40.rar -

It uses lossless algorithms to shrink data size without losing information.

Right-click the main .rar file and select "Extract Here" or "Extract to [Folder Name]" . FOR20-40.rar

Use tools like WinRAR (the official tool), 7-Zip (free and open-source), or WinZip . It uses lossless algorithms to shrink data size

Large datasets are often split into smaller "volumes" or "pieces" (e.g., part1, part2) for easier uploading/downloading. 7-Zip (free and open-source)

A .rar file is a "Roshal Archive," a format used to bundle multiple files into a single, smaller package to save storage space and make it easier to transfer.