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.
Since you've asked to "create content" for this specific file, 1. Understanding Multi-Part RAR Files SiMo13.part1.rar
Ensure the metainfo2.txt file and associated data folders are in the root directory of the SD card, not inside another folder. 4. Safety Precautions SiMo13.part1.rar