Even almost 30 years old, rsync ist still the tool of choice when it comes to (remote) copying. Everything is easy when may small files need to be exchanged, however when it comes to large files (like disk-images) there are some points which must be considered.
Here is a nice article how to get to: rsync -av –partial –inplace –append –progress vmdk_file syncuser@host1:/destination
fedoramagazine.org/copying-large-files-with-rsync-and-some-misconceptions/