Rsync is an android client for the famous Rsync protocol available on all linux laptops and servers. The app supports syncing with all kind of servers on rsync protocol and ssh as well. The app also provides a convenient File Chooser to select sync source and destination on local filesystem and remote file system as well. You can add as many number of servers and as many number of jobs as you want. You can see sync logs for any of the jobs that wsa run on the phone.