How to import ETKs on an Extenso Device not connected to internet? April 22, 2020 13:25 Download ETK on USB Key to import them on Extenso Device. Related articles How to unload ETKs from Extenso Device to your account with internet connection? What is the EXTENSO Data Manager for? Video 5 - Unload ETKs from an Extenso Device not connected to internet and get them on your account. How to import ETKs on Extenso Device with internet connection?