In the evolving field of large language models (LLMs), understanding file naming conventions is essential for developers and researchers. Each LLM file name reveals crucial information about model version, parameter count, intended purpose, quantization level, and file format. This guide dives into the common naming patterns, such as .gguf, .onnx, and .pt formats, as well as quantization markers like Q4 and FP16. By decoding these labels, users can better navigate LLM libraries and select models optimized for specific tasks or deployment needs.