Combines multiple similar files into a single stream to achieve even better compression.
Supports AES-256 encryption to protect your data with a password. Stepu.7z
Can split large files into smaller volumes (e.g., .7z.001 , .7z.002 ) for easier sharing. How to Open or Create "Stepu.7z" Combines multiple similar files into a single stream
Uses the LZMA and LZMA2 algorithms to significantly reduce file sizes. Stepu.7z
daemondevin/7-ZipPortable: A portable build of 7-Zip ... - GitHub
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.