Unload ETKs from an Extenso Device not connected to internet and get them on your account? April 22, 2020 13:31 Updated Unload ETK from Extenso Device to USB Key and Import them online. Related articles How to import ETKs on an Extenso Device not connected to internet? What is the EXTENSO Data Manager for? 1. How to install the ReadSensor 2 Manager (PC Software) on my computer How to import ETKs on Extenso Device with internet connection?