Let the device reboot, wait until you see TWRP "entered fastboot"Check your computer sees the device withfastboot devices(retry until it does)Now erase system and flash a new image:fastboot erase system fastboot flash system whatever-aosp-gsi-ab-arm64.img...
TWRP version: 3.6.2_11-1 For device: gta4lwifi Device Tree:https://github.com/juic3b0x/shrp_android_device_samsung_gta4lwifi Maintainer/Authors build: ragarcia87 //EDIT// BUGS--- For some reason MTP isnt wanting to work for me using linux... havent test...