Use software like WinRAR (Windows/Android) or 7-Zip (Windows/Linux) to handle these archives.
You only need to right-click AreaZ.part1.rar and choose "Extract Here". The software will automatically combine all parts and extract the content. Key Troubleshooting Information AreaZ.part1.rar
You must download all parts in the set (e.g., part1 , part2 , part3 , etc.) and place them in the same folder. AreaZ.part1.rar