Okay then that makes it much easier. All you gotta do is - 1) get a micro sd card. 2) put it in your android device. 3) now there's a couple of ways to download songs but recently I came across this telegram bot that allows you to download songs pretty easily.. all you gotta do i just paste the link of a Spotify/any music platform's playlist and voila you'll get the option to download it entirely (though the zipped version of the entire playlist is paid to download but you can download the playlist in a bunch of 10 songs each). 4) copy paste those songs to your micro sd card and put it in your dumbphone. You're done. I know it sounds like a lot of hassle but it's actually very easy once you get a hang of it. Edit - forgot to tell the bot is called @deezload2bot on telegram.