Dear Friends, here are my last results
1) 1GB SD card (with and without unlock_autoscript)
2) 32GB SD card (with and without unlock_autoscript)
3) 8GB USP pen drive on all three USB portsThe MX Plus box ALWAYS starts Android in safe mode (toothpick method).
At this point I want to thank all you helped me to find a solution. But I think there isn't anything else I can try with this box.
Hi andreaf, what version of MX Plus you have? You can see it here: Mx Plus . The one I had was the "MXplus_S" version of MX Plus and I had no problem installing kszaq 7.0.2.006 version using minimx.dtb and the toothpick method. After that I already upgraded to 007 and used the "gxbb_p200_1Gbit.dtb" without problems. I always used the SD card installation type.
Good luck