Crucially, you cannot extract .part2.rar on its own. For the extraction to work, you must have all parts (Part 1, Part 2, etc.) in the same folder on your computer.
How to extract file.part1.rar, file.part2.rar, ... properly?
If it asks for a "volume," you are missing a part or it is named incorrectly. Ensure the names match (e.g., Erdechu.part1.rar and Erdechu.part2.rar ).
Because is part of a split archive, a "good post" about it should focus on helping people successfully combine and extract it.