: A popular, free, and open-source alternative found at 7-Zip.org .
To successfully extract the contents, you must have (e.g., Red1040.part2.rar , Red1040.part3.rar ) in the same folder. If any part is missing, the extraction will fail with an "unexpected end of archive" or "missing volume" error.
: Another user-friendly open-source option available at PeaZip.github.io . Is it Safe?