Unity projects are collections of many files rather than a single document. Compressing them into archives like .rar or .zip ensures that:
: Use 7-Zip or WinRAR to extract the .rar file. This usually reveals a .unitypackage file or a complete project folder containing an Assets directory. Importing Assets : Download Unity rar
: Uploading and downloading many small files is significantly slower than handling a single compressed archive. Troubleshooting Downloading a RAR file into Unity - Questions & Answers Unity projects are collections of many files rather
: All metadata and dependencies are kept together so the project runs smoothly on different systems. Download Unity rar