Follow these steps to install and update Resilio Sync on a QNAP NAS running QTS version 4.0 or later. If you have BitTorrent Sync (v 2.3.x) installed, settings and folders will be moved to Resilio Sync. Before installing Resilio Sync stop BitTorrent Sync (in AppCenter, default way to stop an app).
You can install Resilio Sync from AppStore. Or do that manually: download the appropriate .qpkg file from below the page. Open "App Center" and click gear icon to get "Install Manually" option.
Click "Browse..." to select the downloaded package. After selecting the .qpkg you downloaded for your NAS (download links below) click "Install".
If you have a QNAP device with ARM, you are most likely to use the x19 or x09 package unless you know you have an x31.
If you have a QNAP device with x86, you are most likely to use the x86 package before x86_64.
* x64 builds can only be used with QTS 4.3. For earlier versions please use x86 package