C:\PortableApps\cwrsync_6.2.11_x64_free\bin>rsync --help  | findstr " -m"

--archive, -a            archive mode is -rlptgoD (no -A,-X,-U,-N,-H)
--verbose, -v            increase verbosity
--recursive, -r          recurse into directories
--hard-links, -H         preserve hard links
--keep-dirlinks, -K      treat symlinked dir on receiver as dir
--times, -t              preserve modification times
--atimes, -U             preserve access (use) times
--crtimes, -N            preserve create times (newness)
--prune-empty-dirs, -m   prune empty directory chains from file-list
--delete                 delete extraneous files from dest dirs
--dry-run, -n            perform a trial run with no changes made
--open-noatime           avoid changing the atime on opened files
--exclude=PATTERN        exclude files matching PATTERN

-avrHKtUNm

--delete
--dry-run
--open-noatime
--exclude=PATTERN