How do I use an Acer custom Secure Boot DA file? After you've downloaded and extracted the bin file, you rename the file to MTK_AllInOne_DA_SP.bin or DA_SWSEC.bin (depending on what you downloaded). At this point, you either manually load the DA in the flash tool you are using or replace the tool's default Download Agent with the custom DA then relaunch the tool. To learn how to use / load a DA file in several Mediatek flash tools, see the guide on how to use a secure boot DA file f
