: Download the latest version (e.g., version 2.2.8 or newer) to your device.
: Navigate to your Android Settings > Security (or Apps & Notifications) and toggle on the option to "Install unknown apps" for your chosen browser or file manager.
: FTP is most secure when used strictly within your home or office network. Avoid running the server while connected to public WiFi to prevent "Man-in-the-Middle" attacks where hackers might intercept your data.