This application connects you to your SFTP server. As login methods you can use a password or your PEM private key. At the moment only PEM keys are supported, so check to have it in the correct format. With release 0.2.2 also encrypted PEM keys are supported. You can browse your files in the SFTP server and download them with a long press, or upload new ones using the '+' floating button. It also supports swipe down to refresh.