Stepu.7z Page

Supports AES-256 encryption to protect your data with a password.

Can be converted into an .exe file that extracts itself without needing the 7-Zip software installed. Stepu.7z

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. Supports AES-256 encryption to protect your data with

daemondevin/7-ZipPortable: A portable build of 7-Zip ... - GitHub Stepu.7z

Combines multiple similar files into a single stream to achieve even better compression.