If the extracted content is for a vehicle (like an Audi navigation update), you will likely need to move the files to an SD card:
A .part1.rar file cannot be opened on its own. It is part of a set that requires all other pieces (e.g., SiMo13.part2.rar , SiMo13.part3.rar ) to be present in the same folder to reconstruct the original data. SiMo13.part1.rar
Check the source where you downloaded the file for a SHA-1 or MD5 hash to ensure the file wasn't corrupted during download. If the extracted content is for a vehicle
Usually, "SiMo" refers to SIMOS or Simo related updates, often found in European car navigation or ECU firmware communities. Usually, "SiMo" refers to SIMOS or Simo related
Download and install WinRAR or 7-Zip .
Use FAT32 for older systems or NTFS/exFAT if specified by the readme file.