Download Android Marshmallow 6.0 firmware for Yundoo Y6 2GB RAM + 8GB ROM TV Box from here, here or here. Download Android Marshmallow 6.0 firmware for Yundoo Y6 2GB RAM + 32GB ROM TV Box from here, here or here. Download Amlogic USB Burning Tool v184.108.40.206 from here.
Archive name: YUNDOO-Y6_rtl8723bs_8g2g_kodi_addons_160809_USB or SD / YUNDOO-Y6_ap6330_32g2g_kodi_addons_160811_USB_SD
Image: aml_upgrade_package.img / aml_upgrade_package.img
Archive file size: 638 MB / 637 MB
Model: YUNDOO Y6 2GB RAM + 8GB ROM / 2GB RAM + 32GB ROM
Platform: AMLogic S905X
Inside archive: firmware + aml_sdc_burn.ini + u-boot.bin.sd.bin + tool_SD (BootcardMakerUpdate & NEXBOX-A95x-update guide-1.0) + tool_USB (USB_Burning_Tool_v220.127.116.11-build7 & How to update S905 or S905X)
Caution Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.