The "Part2" indicates this is the second chunk of a larger file.
Ensure you have Trial3 2 Part1.rar and any others before starting.
You generally need Part 1, Part 2, and any subsequent parts in the same folder to extract the contents. How to open it
If you are looking for a or a specific guide for a piece of software or game associated with this name, let me know. To help you get the right content, could you tell me: The software or game this file belongs to? If you are having a specific error while extracting?
Use WinRAR, 7-Zip, or The Unarchiver (Mac).