Rsync

Frequently used rsync parameters:

-n

Perform a trial run (or dry run), showing which changes would be made.

-P

Show progress during the transfer, and keep partially transferred files.

-a

Archive mode – copy files recursively, and preserve permissions and modification times.

-h

Show human-readable file sizes.

-v

Increase verbosity.

-z

Use compression during the transfer.

--exclude .DS_Store

Avoid littering when copying from a macOS system.