This is the wiki for flashing the J101, you can have a try: J101 Carrier Board | Seeed Studio Wiki
BTW, If you want to boot from the SD card, you need to flash the emmc normally first, then go to the SD with the steps shown in the link
This is the wiki for flashing the J101, you can have a try: J101 Carrier Board | Seeed Studio Wiki
BTW, If you want to boot from the SD card, you need to flash the emmc normally first, then go to the SD with the steps shown in the link