You cannot open only part01.rar . You need every part that belongs to the set.
This file, UNDODI2GB.part01.rar , is the first volume of a . Large files like games or high-definition movies are often split into smaller parts to make them easier to download or store on limited space. UNDODI2GB.part01.rar
Use a tool like WinRAR , 7-Zip , or PeaZip . 2. Step-by-Step Guide You cannot open only part01