How do you connect a big harddrive with all your music (in flac) to phone ? A phone would require some kind of service (not free) for streaming the songs. I pre

How do you connect a big harddrive with all your music (in flac) to phone ? A phone would require some kind of service (not free) for streaming the songs. I prefer to have everything on my harddrive (i do not like to lose audio when the network is down).