There is no widely recognized software feature or specific public project named Based on the file extension, this is likely a private compressed archive created with 7-Zip software.
Can be converted into an .exe file that extracts itself without needing the 7-Zip software installed.
Supports AES-256 encryption to protect your data with a password. Stepu.7z
If you are looking to create a "feature" (functional enhancement) for a project contained within this archive, or if you meant to ask about features for the format itself, here are the standard capabilities and ways to work with it: Common Features of 7z Archives
daemondevin/7-ZipPortable: A portable build of 7-Zip ... - GitHub There is no widely recognized software feature or
Uses the LZMA and LZMA2 algorithms to significantly reduce file sizes.
Combines multiple similar files into a single stream to achieve even better compression. If you are looking to create a "feature"
Can split large files into smaller volumes (e.g., .7z.001 , .7z.002 ) for easier sharing. How to Open or Create "Stepu.7z"