Copy files on service to local directory: You must be in local bash terminal to conduct this command, not when you are in ssh!
# scp username@domain(or ip):remote-file-path local-storage-path
example scp username@domain(or ip):home/xxx/xxx/11.jpeg /Users/username/Desktop/
copy files in local dir to remote service : also you must be in local bash terminal
# scp username@domain(or ip):local-storage-path remote-file-path
example scp username@domain(or ip):/Users/username/Desktop/ home/xxx/xxx/11.jpeg