you can update the os image
http://dl.clockworkpi.com/uConsole_CM4_v1.3g_64bit.img.7z
md5sum 9dbd07a50967f4015ad9c13795cd71c6
it has important kernel patches , some game emulators like retroarch.tic80. liko lowresNX
and here is the tips for 4G ext
enjoy