While 7z is better for compression, use the standard .zip format if you are sharing the files with someone who might not have 7-Zip installed.
Right-click the HTEAT.7z file, select "7-Zip," and choose "Extract Here" or "Extract to [Folder Name]". HTEAT.7z
When archiving, use "Solid" mode for better compression rates on many small files. While 7z is better for compression, use the standard
For optimal performance, especially if dealing with large data sets, the LZMA2 method is recommended. While 7z is better for compression