PaderSyncFM is a cool app that focuses on easy access to mobile file servers using FTP, SFTP, SMB and WebDAV. The application is free for personal use and allows you to copy personal files to and from a mobile device to any file server. Advanced configuration options are available such as synchronization of complete folders and automated tasks. PaderSyncFM is the all-in-one client, but stand-aone versions are also available. Check out pader-sync.com/products.html for more information and to download. PaderSyncFM is free for personal use while a full license for commercial use costs starts at $18.