I need a large drive for mobile pc

I can't afford a pc and use my parents pc and library I have a kindle but it's really old .my phone is a flip phone . I'm using a 32 but can't fit everything in one place essentially when I make music to upload to soundcload on the tablet. I want at least a 128 because I also game and do just about everything it offers as well as wanna store data. So I guess what im asking is what should I get for brand name and size