You can check your firemware version from the following pages:
1.Open QNAP Finder, and the version information will be shown.
2.When you have successfully logged in VioStor, the version information will be appeared at the left-bottom corner of Monitoring Page.
3.You could check your firmware version by "System Settings"->"Server Name" or "System Settings"->"View System Settings".
4.Another firmware version will be display in system update page. The page will show the current version information.