This accessory only supports Android, not Ubuntu. Suitable for Firefly series boards: Firefly-RK3399, Firefly-RK3288; Suitable for AIO series boards:AIO-3399J、AIO-328..
Tips : Make Android SD Card to Startup System:http://en.t-firefly.com/doc/product/info/id/473.htmlMake Linux SD Card to Startup System:http://en.t-firefly.com/doc/product/info/id/471.html..