-sdel (Delete files after compression) switch
Syntax
-sdel
If -sdel switch is specified, 7-Zip deletes files after including to archive. So it works like moving files to archive.
7-Zip deletes files at the end of operation and only if archive was successfully created.Examples
7z a a.7z *.txt -sdel
moves txt files from disk's directory to a.7z archive.