About 7-zip

c:\work\> c:\progra~1\7-zip\7z a -r -mmt  -mx9 conflicts.7z *conflicted*.*

  a: add to archive

  -r: recursive

  -mmt: (multi-threaded)

  -mx9: ultimate compression

 conflicts.7z (destination archive)

 *conflicted*.* (wildcard string to archive)