Can someone help me with something technical?

I recently bought an MP3 player, the San Disk. Little did I know that you can't download music onto it unless you have a computer with a USB port. My MacBook Pro only has a charger and a place for your earphones. Now, I'm installing GarageBand on my Iphone with the hopes of being able to download the files into the San Disk. Is this possible? I'm looking at Youtube videos on how to do it now, ns thought if I ran into problems maybe someone can guide me.

Can someone help me with something technical?
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