Ok, but why /boot/config.txt is present in case if it is not used on m3? I've downloaded this distro http://forum.banana-pi.org/t/pbi-m3-new-image-ubuntu-mate-16-04-desktop-armhf-raspberry-pi-bpi-m3-sd-emmc-img-2016-07-21/2049 prepared for M3. Is there any equivalent option for this file?
My previous hard drive was working, and many other things also. I've ordered yesterday active powered usb hub with DC 5V 1A. You think that this my help? I've read this article and I see that there is a problem with powering. Any other suggestions what can help?