Thanks goes to farrio for this.
I don't know if this has been posted yet.
TO ADD CHANNEL LISTS:
1st Configuration Menu, and in Load M3U file mode set to AUTO
2nd Create a folder on the Pendrive and call it IPTV.
3rd Put the m3u list or lists in the root of the USB.
4th Menu / Net & Games / USB / select m3u file / Red button Tools / Copy to / IPTV
5th Now we go into the NETWORK APPLICATIONS MENU, we select NET LINK, and there will appear the list or lists that you have just loaded.
4th It works better with a network than with Wi-Fi
5th In order not to get an unsupported audio or video Codec message, it is necessary to deactivate the Cccams
If this is not the right place please remove.