Just using it as a streaming machine.

He’s just using it for streaming, figured it having a built in screen would help significantly with the limited space in his flat.

I don’t have answers that haven’t already been said, but I’ll give a recommendation to Seeker as a means of downloading music outside of streaming apps. It’s just a fantastic app for torrenting entire albums from in mp3, ogg, and FLAC format. I’ve downloaded dozens of gigs of music off it so far and will likely have to grab a terabyte micro SD card for my phone.

It’s doable in Boost, too.

Honestly you can get an old iPod, slap a new battery inside, and flash mod it to replace it’s hard drive with an SD card, and you have exactly what you’re looking for in a small, robust, easy to use device.