Applications like The Unarchiver or Keka are popular choices for handling 7z files.
The ID string suggests a batch of media saved from a specific Facebook profile or group.
Always ensure you trust the source of a .7z file before extracting it. Archives can be used to bundle malicious executables. If you did not personally download this file from a known source, consider scanning it with an antivirus tool like Malwarebytes before opening.
Use apps like ZArchiver (Android) or iZip (iOS) to open the archive on a smartphone. Expected Contents Given the file's naming structure, it likely contains: