The only thing I can suggest is to try the 3.7GB update through the update option in Car Setting.
I found this head unit is so locked down that it should have costed $50. instead of $200. (CAD). It doesn't have boot update capability, has minimal settings, poor default apps, useless apps autostarting that can't be stopped, disables or uninstalled. Very poor seller, very poor support, very poor business. I always recommend not buying from Ruancheng whenever possible. I bought a different one for my car from a different seller for cheaper.