To "piece" this file together and see what is inside, you must follow these specific steps: How to Open Multi-Part RAR Files
Do you have of the archive downloaded in that same folder?
The file appears to be a segment of a multi-part compressed archive. When a large file or folder is split into several pieces for easier sharing or storage, they are typically named sequentially (e.g., .part1.rar, .part2.rar).