Place keys in device/rockchip/rk3328/security/ .
To ensure a "verified" and safe installation that doesn't brick your device, the community-standard procedure is: rk3328 firmware android 11 verified
Upgrading older hardware to newer OS versions can sometimes lead to laggy performance or non-functional HDMI-CEC. for flashing? CSC Armbian for RK3318/RK3328 TV box boards - Page 11 Place keys in device/rockchip/rk3328/security/