Ensure you have the complete set ( part01 through the last number) in the same directory. Use an Extractor: Download a tool like WinRAR or 7-Zip .
The software will automatically read through all subsequent parts (including your part20 ) to rebuild the original file. ⚠️ Common Issues data1.part20.rar
Usually follows a pattern like data1.part01.rar , data1.part02.rar , up to the final segment. Ensure you have the complete set ( part01
Right-click only the first file ( data1.part01.rar ) and select "Extract Here" . data1.part20.rar