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hi here

~ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1ea7:0002 SHARKOON Technologies GmbH 2.4G RF Keyboard & Mouse
Bus 001 Device 003: ID 1ea7:0066 SHARKOON Technologies GmbH [Mediatrack Edge Mini Keyboard]
Bus 001 Device 002: ID 13d3:3410 IMC Networks Bluetooth Radio
Bus 001 Device 009: ID 2207:110c Fuzhou Rockchip Electronics Company
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


~ sudo upgrade_tool ld
List of rockusb connected(1)
DevNo=1 Vid=0x2207,Pid=0x110c,LocationID=11 Mode=Maskrom SerialNo=
~ sudo upgrade_tool uf update.img
Loading firmware...
Loading firmware failed!
~


how to handle the case?

Thanks

Hello, please check if the firmware used is SPI NAND, if the firmware using SDCARD is not able to read and load correctly