Check these after update:
Ensure the USB is FAT32. Some units require a specific folder path: mntd/media_rww/udisk/update.zip . allwinner t5 firmware update full
Dr. Flash explained that T5 units almost always require a specific app file, usually ending in .apk , to handle the installation of a large update. If you just drag and drop a ZIP file without running the specific update app for that unit, the system doesn't know what to do with it. Check these after update: Ensure the USB is FAT32