did you download the file from (a specific site, forum, or GitHub link)? What is the full list of part files you have?
I can help determine the exact nature of the file and how to use it. esp628.part1.rar
RAR split archive part 1. You will need all subsequent parts (part2, part3, etc.) to extract the file, as it is likely a compressed file for ESP-based hardware (such as Espressif ESP8266 or ESP32 modules). did you download the file from (a specific