@SagelessFox You can upgrade via u-boot. Setting your PC ip address to 192.168.1.2 and starting tftpd server, then attaching your PC to b1300 router. Renaming firmware’s name to lede-gl-b1300.bin and placing it to tftpd server’s directory. It will fresh the image automatically when power on the device. Don’t forget stopping tftpd server when all is done.