Latest method！！！How to upgrade A30 firmware
something about how to upgrade the firmware about smartto.
1. Go to the official website to download the toolkit first. Then open the Smartto toolkit 2.Select the correct USB port and select the firmware 3.Upgrade from the local The printer configuration should be reset after a successful update to restore the default settings
first flash M file then S file
when you flash the S file,
need an sd card in the external slot
It is recommended to use the toolkit for updates.