Download all .part files associated with this project (e.g., .part2.rar , .part3.rar ) into the same folder, then use a tool like WinRAR or 7-Zip to extract them. If you can share:
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). esp628.part1.rar
I can help determine the exact nature of the file and how to use it. Download all