Secure Shell (SSH) is a network protocol used for securely accessing network services over an unsecured network. Enabling SSH allows users to connect to the NAS using an SSH-encrypted connection or a SSH client such as PuTTY.

SSH File Transfer Protocol (SFTP) is a secure network protocol that works with SSH connections to transfer files and navigate through the QTS filesystem. SFTP can be enabled after allowing SSH connections on the NAS.